Sandeep Shiyekar - Academia.edu (original) (raw)

Papers by Sandeep Shiyekar

Springer eBooks, Dec 10, 2009

Estimation of displacements and stresses in functionally graded (FG) beams and plates are carried... more Estimation of displacements and stresses in functionally graded (FG) beams and plates are carried out using higher order shear and normal deformation theories (HOSNTs). Taylor’s series expansion is adopted to approximate primary displacements in the thickness direction. This leads to the reduction of three-dimensional (3D) problem to two-dimensional (2D) problem, which ultimately reduces the complexity, normally associated with 3D analysis.

Journal of emerging technologies and innovative research, Jul 1, 2020

In today's growing housing industry , time cost and quality work are the foremost important eleme... more In today's growing housing industry , time cost and quality work are the foremost important elements. Traditional building design was majorly hooked in to two-dimensional (2D) drawings. BIM is one among the primary software emerged within the 1970s for building modelling and designing. BIM give us three-dimensional (3D) model of the building (Length, breadth, and height), fourth dimensional (4D) model including time and also the fifth dimensional model (5D) with cost estimation. This features enables the visualization ,scheduling ,planning, monitoring and clash detection of all pre-construction and post-construction processes of a building. This paper gives a transparent view on used the knowledge of all a live project of traditionally built residential building processes of a building, which was remolded using 4D and 5D BIM technique. the aim of this study was to match and analyze the impact of 4D and 5D BIM on time and price parameter of live project .This paper also explain uses of varied software like REVIT, Microsoft Project,Naviswork Manage to make 5D model.

Composite Structures, Feb 1, 2013

ABSTRACT A complete analytical model, which incorporates shear deformation as well as transverse ... more ABSTRACT A complete analytical model, which incorporates shear deformation as well as transverse normal thermal strains is assessed for the thermal stress analysis of cross-ply laminates subjected to linear or gradient thermal profile across thickness of the laminate. Primary displacement field is expanded in the thickness direction using twelve degrees of freedom. Equilibrium equations in the present higher order shear and normal deformation theory (HOSNT12) are variationally consistent and obtained using principle of virtual work [1]. Numerical results of displacements and stresses are compared with three dimensional (3D) elasticity solution and other two dimensional (2D) models.

International Journal for Research in Applied Science and Engineering Technology, Aug 31, 2023

This paper presents a numerical method using ANSYS to estimate the buckling loads of composite pl... more This paper presents a numerical method using ANSYS to estimate the buckling loads of composite plates. Our approach employs an element based on FSDT that considers out-of-plane shear deformation. We used an Eight node SHELL281 element that is well-suited for analyzing plate and shell structures. The ANSYS results for buckling loads of isotropic and orthotropic layered laminates are in good agreement with other theories from the literature. In this study, we investigated uniaxial and biaxial buckling of the plates and also considered the degree of orthotropy to study its impact on the plates' buckling. I. INTRODUCTION Researchers have extensively studied the load-carrying capacity of fiber-reinforced composites in the form of relatively thick plates, considering various loading and boundary conditions to prevent buckling. The following is a list of researchers who have investigated the elastic buckling of laminated composite plates. Jones [1] investigated the behavior of composite laminated plates, including both macro and micromechanical behavior, and analyzed the plates. Reddy [2] presented different shear deformation theories for composite laminated plates and their finite element formulation, while also analyzing them. Kaw [3] introduced composite materials and analyzed their macro and micromechanical behavior, including failure, analysis, and design of laminates. Gibson [4] studied fiber-reinforced composite laminate, analyzing hygrothermal effects, interlaminate stresses, laminate strength analysis, deflection and buckling of laminates, and selection of laminate design. Ferreira et al. [5] used radial basis function to analyze the static deformations of composite beams and plates. Reddy and Phan [6] studied higher-order shear deformation theory and its application to stability and vibration of composite laminated plates. Kant and Swaminathan [7] presented an analytical solution for composite plates, including the effect of transverse shear deformation, transverse normal strain/stress, and a nonlinear variation of in-plane displacements with respect to the thickness coordinates. Noor et al. [8] used numerical simulations to study the buckling and post-buckling responses and failure initiation of flat, unstiffened composite panels. Reddy and Barbero [9] developed a plate bending element based on the generalized laminate plate theory and presented a method for computing interlaminar stresses. Hsuan and Horng [10] used a sequential linear programming method to maximize the buckling resistance of symmetrically laminated plates with a given material system and subjected to uniaxial compression. Matsunaga [11] analyzed the natural frequencies and buckling stresses of cross-ply laminated composite plates, considering the effects of shear deformation, thickness change, and rotatory inertia. Bert and Devarakonda [12] presented a solution for the buckling of a rectangular plate subjected to a half-sine load distribution on two opposite sides. Akavci et al. [13] studied laminated plates on an elastic foundation, analyzing the bending deflections of symmetric cross-ply laminates. Panda and Ramchandra [14] studied the buckling and post-buckling behavior of simply supported composite plates, including the effect of shear deformation on the buckling load. Khdeir [15] developed an exact solution to the buckling of antisymmetric angle-ply laminated plates, and Shukla et al. [16] estimated critical or buckling loads of laminated composite rectangular plates under in-plane loading. The study by Nemeth and Nemith and Weaver [17] presented non-dimensional parameters and equations that govern the buckling behavior of rectangular symmetrically laminated plates. These equations can be applied to plates made of various structural materials in a general and comprehensive way to represent their buckling resistance. York [18] focused on the benchmark configuration of fully extensionally isotropic laminated plates with matching elastic properties in both extension and bending, as well as some special cases. Ren and Tong [19] reviewed previous research on the elastic buckling of rectangular plates with different boundary conditions and simulated the realistic load and restraining conditions of web plates in I-girders. They analyzed the buckling load of a large number of models under patch load using ANSYS and proposed formulas to predict the elastic buckling coefficients of the webs in I-girders. Their formulas accurately considered the rotational restraints provided by the flanges on the web plates.

Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. ... more Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information (STI) program plays a key part in helping NASA maintain this important role. The NASA STI program operates under the auspices of the Agency Chief Information Officer. It collects, organizes, provides for archiving, and disseminates NASA's STI. The NASA STI program provides access to the NASA Aeronautics and Space Database and its public interface, the NASA Technical Report Server, thus providing one of the largest collections of aeronautical and space science STI in the world. Results are published in both non-NASA channels and by NASA in the NASA STI Report Series, which includes the following report types: TECHNICAL PUBLICATION. Reports of completed research or a major significant phase of research that present the results of NASA programs and include extensive data or theoretical analysis. Includes compilations of significant scientific and technical data and information deemed to be of continuing reference value. NASA counterpart of peerreviewed formal professional papers, but having less stringent limitations on manuscript length and extent of graphic presentations. TECHNICAL MEMORANDUM. Scientific and technical findings that are preliminary or of specialized interest, e.g., quick release reports, working papers, and bibliographies that contain minimal annotation. Does not contain extensive analysis. CONTRACTOR REPORT. Scientific and technical findings by NASA-sponsored contractors and grantees. CONFERENCE PUBLICATION. Collected papers from scientific and technical conferences, symposia, seminars, or other meetings sponsored or co-sponsored by NASA. SPECIAL PUBLICATION. Scientific, technical, or historical information from NASA programs, projects, and missions, often concerned with subjects having substantial public interest. TECHNICAL TRANSLATION. Englishlanguage translations of foreign scientific and technical material pertinent to NASA's mission. Specialized services also include creating custom thesauri, building customized databases, and organizing and publishing research results.

International Journal of Innovative Research and Creative Technology, Dec 1, 2015

Analytical models in an isotropic and single layered laminated orthotropic plate gives shear defo... more Analytical models in an isotropic and single layered laminated orthotropic plate gives shear deformation and transverse normal thermal strains is validated for the thermal stress analysis subjected to gradient thermal profile across the thickness of laminate. Benchmark results for isotropic are prepared for sinusoidal and parabolic thermal profiles. First Order Shear Deformation Theory is used for calculating various quantities. The paper consists of results which give good agreement with gradient, sinusoidal and parabolic thermal profiles especially for thin plates having aspect ratio more than 10.

When a member is subjected to combined action of bending moment, shear and axial force, bending m... more When a member is subjected to combined action of bending moment, shear and axial force, bending moment & axial force is assumed to resist by whole section and shear is resisted by web only. In such case web shall be designed for combined shear and axial force. The present study determines the strength of web of steel girder under the action of pure shear, pure axial force and combination of it. The classical plate buckling theory is already established to determine the critical buckling strength of web panel of the girder under pure axial compression and pure shear. Using Von Mises yield criteria interaction between axial compression and shear is presented. It has been observed that limit strength of web in combined axial compression and shear is governed by buckling of girder rather buckling of web panel.

Aerospace Science and Technology, Oct 1, 2015

Abstract This paper presents a study on bending performance of transversely isotropic functionall... more Abstract This paper presents a study on bending performance of transversely isotropic functionally graded (FG) plates under transverse mechanical load. Computational and analytical tools are used to study the behavior of FG plates under bending. Analytical modeling is based on Reddy's third order theory (TOT) [1] and a finite element computational tool ABAQUS [2] is used to model FG material through user defined subroutine UMAT. Elastic properties of FG material are based on power law and are varying across the thickness of the plate while Poisson's ratio is kept constant. Results from computational tools for an FG plate with standard boundary and loading conditions are validated with literature and TOT. After validation, FG plate with various boundary conditions and shape are analyzed.

IOSR Journal of Mechanical and Civil Engineering, 2017

In this paper main focus is given on alternative ways of thermal load applied through the thickne... more In this paper main focus is given on alternative ways of thermal load applied through the thickness of laminated composite plate. Research has assumed gradient or constant thermal profile along the thickness of the plate. Laminated composite is a complex material therefore assumed loading profiles may not obey the gradient or constant thermal profile path therefore, as a research in all total 10 thermal profiles are studied. The results in tabular and graphical forms are presented along with discussion. First Order Shear Deformation Theory (FOST) is used for analysis. Various quantities, namely in plane as well as transverse displacements and stresses are obtained when thermal load is applied in various orientations along the thickness of the plate. Main focus in this article is analysis of transverse shear displacement and results are presented in tabular and graphical form.

International Journal of Mechanical Sciences, 1990

A highly accurate and computationally efficient numerical method is developed for the flexural vi... more A highly accurate and computationally efficient numerical method is developed for the flexural vibration of isotropic and orthotropic triangular plates. A set of two-dimensional orthogonal plate functions is used as an admissible displacement function in the Rayleigh-Ritz method to obtain the natural frequencies and mode shapes for the plates. From a prescribed starting function satisfying the boundary conditions, the higher terms in the orthogonal plate functions are constructed using the Gram-Schmidt orthogonalization process. Natural frequencies and mode shapes are obtained for three triangular plates with different support conditions. The obtained numerical results are presented, and the isotropic case is verified with other numerical methods in the literature. NOTATION a, b the sides of plate aij coefficient Ci coefficient D flexural rigidity = Eh3/12(1v 2) D O bending and twisting rigidities of orthotropic plate D11 Elh3/12(1-VI2V21) Dr2 v12E2h3/12(1-Y12V21) D22 E2h3/12(1-v12vzl) D66 Gh3/12 D'11 DI~/x/Dl~D22 D'I 2 D12/~fDllD22 D'22 D22/x/DllD22 D'66 D66/N/D11D22 f(~, ~/) generating function G shear modulus of elasticity h thickness of plate m number of terms used in the doubly infinite deflection series Tma x maximum kinetic energy Um,x maximum strain energy W(~, ~/) deflection function x, y Cartesian coordinates ~b(~, ~/) orthogonal plate function x/a r 1 y/b x/~ nondimensional frequency parameter v, v12, v21 Poisson's ratios ~0(¢, r/) edge function co angular frequency side ratio a/b

International Journal for Research in Applied Science and Engineering Technology

: This paper presents a numerical method using ANSYS to estimate the buckling loads of composite ... more : This paper presents a numerical method using ANSYS to estimate the buckling loads of composite plates. Our approach employs an element based on FSDT that considers out-of-plane shear deformation. We used an Eight node SHELL281 element that is well-suited for analyzing plate and shell structures. The ANSYS results for buckling loads of isotropic and orthotropic layered laminates are in good agreement with other theories from the literature. In this study, we investigated uniaxial and biaxial buckling of the plates and also considered the degree of orthotropy to study its impact on the plates' buckling.

International Journal for Research in Applied Science and Engineering Technology

: Important structural properties of composite materials, such as high strength-to-weight and hig... more : Important structural properties of composite materials, such as high strength-to-weight and high stiffness-to-weight ratios, have resulted in a great need for these materials in various engineering industries, such as Mechanical, Civil, Automobile and Aerospace Engineering. This paper presents results from numerical investigations using software based on Finite Element Method (FEM) and its comparison with other theories from the literature under free vibrations of 5 and 7 layered sandwich plates. This study utilizes the finite element method to perform modal analysis of a sandwich composite plate with a honeycomb core. In this paper, the modal responses of a flat rectangular sandwich plate with a honeycomb core using FEM software are presented. To confirm the accuracy and reliability of the current model, validation with present literature is studied. In this study, aluminum honeycomb is used as the core materials, while glass fiber reinforced composite is used for the top and bottom of the plate to examine modal responses. Free vibration responses are investigated for the various boundary situations. The modal analysis of composite sandwich constructions was investigated, and the results were verified using available literature. The sandwich structure was solved using a finite element approach, which was modeled in ABAQUS software. The results indicated that frequencies by FEM software are in good agreement with other literature results.

Journal of emerging technologies and innovative research, Jul 1, 2020

In today's growing housing industry , time cost and quality work are the foremost important eleme... more In today's growing housing industry , time cost and quality work are the foremost important elements. Traditional building design was majorly hooked in to two-dimensional (2D) drawings. BIM is one among the primary software emerged within the 1970s for building modelling and designing. BIM give us three-dimensional (3D) model of the building (Length, breadth, and height), fourth dimensional (4D) model including time and also the fifth dimensional model (5D) with cost estimation. This features enables the visualization ,scheduling ,planning, monitoring and clash detection of all pre-construction and post-construction processes of a building. This paper gives a transparent view on used the knowledge of all a live project of traditionally built residential building processes of a building, which was remolded using 4D and 5D BIM technique. the aim of this study was to match and analyze the impact of 4D and 5D BIM on time and price parameter of live project .This paper also explain uses of varied software like REVIT, Microsoft Project,Naviswork Manage to make 5D model.

Sadhana, 2014

In structural analysis,especially in indeterminate structures, it becomes essential to know mater... more In structural analysis,especially in indeterminate structures, it becomes essential to know material and geometrical properties of members. The codal provisions recommend elastic properties of concrete and steel and these are fairly accurate enough. The stress-strain curve for concrete cylinder or a cube specimen is plotted. The slope of this curve is modulus of elasticity of plain concrete. Another method of determining modulus of elasticity of concrete is by flexural test of a beam specimen. The modulus of elasticity most commonly used for concrete is secant modulus. The modulus of elasticity of steel is obtained by performing a tension test of steel bar. While performing analysis by any software for high rise building, cross area of plain concrete is taken into consideration whereas effects of reinforcement bars and concrete confined by stirrups are neglected. The aim of study is to determine elastic properties of reinforced cement concrete material. Two important stiffness properties such as AE and EI play important role in analysis of high rise RCC building idealized as plane frame. The experimental programme consists of testing of beams (model size 150 × 150 × 700 mm) with percentage of reinforcement varying from 0.54 to 1.63%. The experimental results are verified by using 3D finite element techniques. This study refers to the effect of variation of percentage of main longitudinal reinforcement and concrete grade. Effect of confinement is not considered and it appears in a separate study.

Composite Structures, 2013

ABSTRACT A complete analytical model, which incorporates shear deformation as well as transverse ... more ABSTRACT A complete analytical model, which incorporates shear deformation as well as transverse normal thermal strains is assessed for the thermal stress analysis of cross-ply laminates subjected to linear or gradient thermal profile across thickness of the laminate. Primary displacement field is expanded in the thickness direction using twelve degrees of freedom. Equilibrium equations in the present higher order shear and normal deformation theory (HOSNT12) are variationally consistent and obtained using principle of virtual work [1]. Numerical results of displacements and stresses are compared with three dimensional (3D) elasticity solution and other two dimensional (2D) models.

Composite Structures, 2011

This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright

IUTAM Symposium on Multi-Functional Material Structures and Systems, 2009

Abstract Estimation of displacements and stresses in functionally graded (FG) beams and plates ar... more Abstract Estimation of displacements and stresses in functionally graded (FG) beams and plates are carried out using higher order shear and normal deformation theories (HOSNTs). Taylor's series expansion is adopted to approximate primary displacements in the thickness ...

Computers & Structures, 2008

An analytical solution, based on a higher order shear and normal deformation theory, is presented... more An analytical solution, based on a higher order shear and normal deformation theory, is presented for the cylindrical flexure of piezoelectric plates. The primary displacement terms are expanded in thickness coordinate and an exact nature of electric potential is obtained in actuator and sensing layers. The electric potential function is evaluated by solving a second order ordinary differential equation satisfying electric boundary conditions along thickness direction of piezoelectric layer. A unidirectional composite plate attached with distributed actuator and sensor layers is analyzed under electrical and mechanical loading conditions and comparison of results with exact solution is presented. Results for non-piezoelectric plates are also compared with elasticity and other solutions of cylindrical bending.

International Journal of Mechanics and Materials in Design, 2010

Composite Structures, 2013

A complete analytical model, which incorporates shear deformation as well as transverse normal th... more A complete analytical model, which incorporates shear deformation as well as transverse normal thermal strains is assessed for the thermal stress analysis of cross-ply laminates subjected to linear or gradient thermal profile across thickness of the laminate. Primary displacement field is expanded in the thickness direction using twelve degrees of freedom. Equilibrium equations in the present higher order shear and normal deformation theory (HOSNT12) are variationally consistent and obtained using principle of virtual work [1]. Numerical results of displacements and stresses are compared with three dimensional (3D) elasticity solution and other two dimensional (2D) models.

Springer eBooks, Dec 10, 2009

Estimation of displacements and stresses in functionally graded (FG) beams and plates are carried... more Estimation of displacements and stresses in functionally graded (FG) beams and plates are carried out using higher order shear and normal deformation theories (HOSNTs). Taylor’s series expansion is adopted to approximate primary displacements in the thickness direction. This leads to the reduction of three-dimensional (3D) problem to two-dimensional (2D) problem, which ultimately reduces the complexity, normally associated with 3D analysis.

Journal of emerging technologies and innovative research, Jul 1, 2020

In today's growing housing industry , time cost and quality work are the foremost important eleme... more In today's growing housing industry , time cost and quality work are the foremost important elements. Traditional building design was majorly hooked in to two-dimensional (2D) drawings. BIM is one among the primary software emerged within the 1970s for building modelling and designing. BIM give us three-dimensional (3D) model of the building (Length, breadth, and height), fourth dimensional (4D) model including time and also the fifth dimensional model (5D) with cost estimation. This features enables the visualization ,scheduling ,planning, monitoring and clash detection of all pre-construction and post-construction processes of a building. This paper gives a transparent view on used the knowledge of all a live project of traditionally built residential building processes of a building, which was remolded using 4D and 5D BIM technique. the aim of this study was to match and analyze the impact of 4D and 5D BIM on time and price parameter of live project .This paper also explain uses of varied software like REVIT, Microsoft Project,Naviswork Manage to make 5D model.

Composite Structures, Feb 1, 2013

ABSTRACT A complete analytical model, which incorporates shear deformation as well as transverse ... more ABSTRACT A complete analytical model, which incorporates shear deformation as well as transverse normal thermal strains is assessed for the thermal stress analysis of cross-ply laminates subjected to linear or gradient thermal profile across thickness of the laminate. Primary displacement field is expanded in the thickness direction using twelve degrees of freedom. Equilibrium equations in the present higher order shear and normal deformation theory (HOSNT12) are variationally consistent and obtained using principle of virtual work [1]. Numerical results of displacements and stresses are compared with three dimensional (3D) elasticity solution and other two dimensional (2D) models.

International Journal for Research in Applied Science and Engineering Technology, Aug 31, 2023

This paper presents a numerical method using ANSYS to estimate the buckling loads of composite pl... more This paper presents a numerical method using ANSYS to estimate the buckling loads of composite plates. Our approach employs an element based on FSDT that considers out-of-plane shear deformation. We used an Eight node SHELL281 element that is well-suited for analyzing plate and shell structures. The ANSYS results for buckling loads of isotropic and orthotropic layered laminates are in good agreement with other theories from the literature. In this study, we investigated uniaxial and biaxial buckling of the plates and also considered the degree of orthotropy to study its impact on the plates' buckling. I. INTRODUCTION Researchers have extensively studied the load-carrying capacity of fiber-reinforced composites in the form of relatively thick plates, considering various loading and boundary conditions to prevent buckling. The following is a list of researchers who have investigated the elastic buckling of laminated composite plates. Jones [1] investigated the behavior of composite laminated plates, including both macro and micromechanical behavior, and analyzed the plates. Reddy [2] presented different shear deformation theories for composite laminated plates and their finite element formulation, while also analyzing them. Kaw [3] introduced composite materials and analyzed their macro and micromechanical behavior, including failure, analysis, and design of laminates. Gibson [4] studied fiber-reinforced composite laminate, analyzing hygrothermal effects, interlaminate stresses, laminate strength analysis, deflection and buckling of laminates, and selection of laminate design. Ferreira et al. [5] used radial basis function to analyze the static deformations of composite beams and plates. Reddy and Phan [6] studied higher-order shear deformation theory and its application to stability and vibration of composite laminated plates. Kant and Swaminathan [7] presented an analytical solution for composite plates, including the effect of transverse shear deformation, transverse normal strain/stress, and a nonlinear variation of in-plane displacements with respect to the thickness coordinates. Noor et al. [8] used numerical simulations to study the buckling and post-buckling responses and failure initiation of flat, unstiffened composite panels. Reddy and Barbero [9] developed a plate bending element based on the generalized laminate plate theory and presented a method for computing interlaminar stresses. Hsuan and Horng [10] used a sequential linear programming method to maximize the buckling resistance of symmetrically laminated plates with a given material system and subjected to uniaxial compression. Matsunaga [11] analyzed the natural frequencies and buckling stresses of cross-ply laminated composite plates, considering the effects of shear deformation, thickness change, and rotatory inertia. Bert and Devarakonda [12] presented a solution for the buckling of a rectangular plate subjected to a half-sine load distribution on two opposite sides. Akavci et al. [13] studied laminated plates on an elastic foundation, analyzing the bending deflections of symmetric cross-ply laminates. Panda and Ramchandra [14] studied the buckling and post-buckling behavior of simply supported composite plates, including the effect of shear deformation on the buckling load. Khdeir [15] developed an exact solution to the buckling of antisymmetric angle-ply laminated plates, and Shukla et al. [16] estimated critical or buckling loads of laminated composite rectangular plates under in-plane loading. The study by Nemeth and Nemith and Weaver [17] presented non-dimensional parameters and equations that govern the buckling behavior of rectangular symmetrically laminated plates. These equations can be applied to plates made of various structural materials in a general and comprehensive way to represent their buckling resistance. York [18] focused on the benchmark configuration of fully extensionally isotropic laminated plates with matching elastic properties in both extension and bending, as well as some special cases. Ren and Tong [19] reviewed previous research on the elastic buckling of rectangular plates with different boundary conditions and simulated the realistic load and restraining conditions of web plates in I-girders. They analyzed the buckling load of a large number of models under patch load using ANSYS and proposed formulas to predict the elastic buckling coefficients of the webs in I-girders. Their formulas accurately considered the rotational restraints provided by the flanges on the web plates.

Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. ... more Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information (STI) program plays a key part in helping NASA maintain this important role. The NASA STI program operates under the auspices of the Agency Chief Information Officer. It collects, organizes, provides for archiving, and disseminates NASA's STI. The NASA STI program provides access to the NASA Aeronautics and Space Database and its public interface, the NASA Technical Report Server, thus providing one of the largest collections of aeronautical and space science STI in the world. Results are published in both non-NASA channels and by NASA in the NASA STI Report Series, which includes the following report types: TECHNICAL PUBLICATION. Reports of completed research or a major significant phase of research that present the results of NASA programs and include extensive data or theoretical analysis. Includes compilations of significant scientific and technical data and information deemed to be of continuing reference value. NASA counterpart of peerreviewed formal professional papers, but having less stringent limitations on manuscript length and extent of graphic presentations. TECHNICAL MEMORANDUM. Scientific and technical findings that are preliminary or of specialized interest, e.g., quick release reports, working papers, and bibliographies that contain minimal annotation. Does not contain extensive analysis. CONTRACTOR REPORT. Scientific and technical findings by NASA-sponsored contractors and grantees. CONFERENCE PUBLICATION. Collected papers from scientific and technical conferences, symposia, seminars, or other meetings sponsored or co-sponsored by NASA. SPECIAL PUBLICATION. Scientific, technical, or historical information from NASA programs, projects, and missions, often concerned with subjects having substantial public interest. TECHNICAL TRANSLATION. Englishlanguage translations of foreign scientific and technical material pertinent to NASA's mission. Specialized services also include creating custom thesauri, building customized databases, and organizing and publishing research results.

International Journal of Innovative Research and Creative Technology, Dec 1, 2015

Analytical models in an isotropic and single layered laminated orthotropic plate gives shear defo... more Analytical models in an isotropic and single layered laminated orthotropic plate gives shear deformation and transverse normal thermal strains is validated for the thermal stress analysis subjected to gradient thermal profile across the thickness of laminate. Benchmark results for isotropic are prepared for sinusoidal and parabolic thermal profiles. First Order Shear Deformation Theory is used for calculating various quantities. The paper consists of results which give good agreement with gradient, sinusoidal and parabolic thermal profiles especially for thin plates having aspect ratio more than 10.

When a member is subjected to combined action of bending moment, shear and axial force, bending m... more When a member is subjected to combined action of bending moment, shear and axial force, bending moment & axial force is assumed to resist by whole section and shear is resisted by web only. In such case web shall be designed for combined shear and axial force. The present study determines the strength of web of steel girder under the action of pure shear, pure axial force and combination of it. The classical plate buckling theory is already established to determine the critical buckling strength of web panel of the girder under pure axial compression and pure shear. Using Von Mises yield criteria interaction between axial compression and shear is presented. It has been observed that limit strength of web in combined axial compression and shear is governed by buckling of girder rather buckling of web panel.

Aerospace Science and Technology, Oct 1, 2015

Abstract This paper presents a study on bending performance of transversely isotropic functionall... more Abstract This paper presents a study on bending performance of transversely isotropic functionally graded (FG) plates under transverse mechanical load. Computational and analytical tools are used to study the behavior of FG plates under bending. Analytical modeling is based on Reddy's third order theory (TOT) [1] and a finite element computational tool ABAQUS [2] is used to model FG material through user defined subroutine UMAT. Elastic properties of FG material are based on power law and are varying across the thickness of the plate while Poisson's ratio is kept constant. Results from computational tools for an FG plate with standard boundary and loading conditions are validated with literature and TOT. After validation, FG plate with various boundary conditions and shape are analyzed.

IOSR Journal of Mechanical and Civil Engineering, 2017

In this paper main focus is given on alternative ways of thermal load applied through the thickne... more In this paper main focus is given on alternative ways of thermal load applied through the thickness of laminated composite plate. Research has assumed gradient or constant thermal profile along the thickness of the plate. Laminated composite is a complex material therefore assumed loading profiles may not obey the gradient or constant thermal profile path therefore, as a research in all total 10 thermal profiles are studied. The results in tabular and graphical forms are presented along with discussion. First Order Shear Deformation Theory (FOST) is used for analysis. Various quantities, namely in plane as well as transverse displacements and stresses are obtained when thermal load is applied in various orientations along the thickness of the plate. Main focus in this article is analysis of transverse shear displacement and results are presented in tabular and graphical form.

International Journal of Mechanical Sciences, 1990

A highly accurate and computationally efficient numerical method is developed for the flexural vi... more A highly accurate and computationally efficient numerical method is developed for the flexural vibration of isotropic and orthotropic triangular plates. A set of two-dimensional orthogonal plate functions is used as an admissible displacement function in the Rayleigh-Ritz method to obtain the natural frequencies and mode shapes for the plates. From a prescribed starting function satisfying the boundary conditions, the higher terms in the orthogonal plate functions are constructed using the Gram-Schmidt orthogonalization process. Natural frequencies and mode shapes are obtained for three triangular plates with different support conditions. The obtained numerical results are presented, and the isotropic case is verified with other numerical methods in the literature. NOTATION a, b the sides of plate aij coefficient Ci coefficient D flexural rigidity = Eh3/12(1v 2) D O bending and twisting rigidities of orthotropic plate D11 Elh3/12(1-VI2V21) Dr2 v12E2h3/12(1-Y12V21) D22 E2h3/12(1-v12vzl) D66 Gh3/12 D'11 DI~/x/Dl~D22 D'I 2 D12/~fDllD22 D'22 D22/x/DllD22 D'66 D66/N/D11D22 f(~, ~/) generating function G shear modulus of elasticity h thickness of plate m number of terms used in the doubly infinite deflection series Tma x maximum kinetic energy Um,x maximum strain energy W(~, ~/) deflection function x, y Cartesian coordinates ~b(~, ~/) orthogonal plate function x/a r 1 y/b x/~ nondimensional frequency parameter v, v12, v21 Poisson's ratios ~0(¢, r/) edge function co angular frequency side ratio a/b

International Journal for Research in Applied Science and Engineering Technology

: This paper presents a numerical method using ANSYS to estimate the buckling loads of composite ... more : This paper presents a numerical method using ANSYS to estimate the buckling loads of composite plates. Our approach employs an element based on FSDT that considers out-of-plane shear deformation. We used an Eight node SHELL281 element that is well-suited for analyzing plate and shell structures. The ANSYS results for buckling loads of isotropic and orthotropic layered laminates are in good agreement with other theories from the literature. In this study, we investigated uniaxial and biaxial buckling of the plates and also considered the degree of orthotropy to study its impact on the plates' buckling.

International Journal for Research in Applied Science and Engineering Technology

: Important structural properties of composite materials, such as high strength-to-weight and hig... more : Important structural properties of composite materials, such as high strength-to-weight and high stiffness-to-weight ratios, have resulted in a great need for these materials in various engineering industries, such as Mechanical, Civil, Automobile and Aerospace Engineering. This paper presents results from numerical investigations using software based on Finite Element Method (FEM) and its comparison with other theories from the literature under free vibrations of 5 and 7 layered sandwich plates. This study utilizes the finite element method to perform modal analysis of a sandwich composite plate with a honeycomb core. In this paper, the modal responses of a flat rectangular sandwich plate with a honeycomb core using FEM software are presented. To confirm the accuracy and reliability of the current model, validation with present literature is studied. In this study, aluminum honeycomb is used as the core materials, while glass fiber reinforced composite is used for the top and bottom of the plate to examine modal responses. Free vibration responses are investigated for the various boundary situations. The modal analysis of composite sandwich constructions was investigated, and the results were verified using available literature. The sandwich structure was solved using a finite element approach, which was modeled in ABAQUS software. The results indicated that frequencies by FEM software are in good agreement with other literature results.

Journal of emerging technologies and innovative research, Jul 1, 2020

In today's growing housing industry , time cost and quality work are the foremost important eleme... more In today's growing housing industry , time cost and quality work are the foremost important elements. Traditional building design was majorly hooked in to two-dimensional (2D) drawings. BIM is one among the primary software emerged within the 1970s for building modelling and designing. BIM give us three-dimensional (3D) model of the building (Length, breadth, and height), fourth dimensional (4D) model including time and also the fifth dimensional model (5D) with cost estimation. This features enables the visualization ,scheduling ,planning, monitoring and clash detection of all pre-construction and post-construction processes of a building. This paper gives a transparent view on used the knowledge of all a live project of traditionally built residential building processes of a building, which was remolded using 4D and 5D BIM technique. the aim of this study was to match and analyze the impact of 4D and 5D BIM on time and price parameter of live project .This paper also explain uses of varied software like REVIT, Microsoft Project,Naviswork Manage to make 5D model.

Sadhana, 2014

In structural analysis,especially in indeterminate structures, it becomes essential to know mater... more In structural analysis,especially in indeterminate structures, it becomes essential to know material and geometrical properties of members. The codal provisions recommend elastic properties of concrete and steel and these are fairly accurate enough. The stress-strain curve for concrete cylinder or a cube specimen is plotted. The slope of this curve is modulus of elasticity of plain concrete. Another method of determining modulus of elasticity of concrete is by flexural test of a beam specimen. The modulus of elasticity most commonly used for concrete is secant modulus. The modulus of elasticity of steel is obtained by performing a tension test of steel bar. While performing analysis by any software for high rise building, cross area of plain concrete is taken into consideration whereas effects of reinforcement bars and concrete confined by stirrups are neglected. The aim of study is to determine elastic properties of reinforced cement concrete material. Two important stiffness properties such as AE and EI play important role in analysis of high rise RCC building idealized as plane frame. The experimental programme consists of testing of beams (model size 150 × 150 × 700 mm) with percentage of reinforcement varying from 0.54 to 1.63%. The experimental results are verified by using 3D finite element techniques. This study refers to the effect of variation of percentage of main longitudinal reinforcement and concrete grade. Effect of confinement is not considered and it appears in a separate study.

Composite Structures, 2013

ABSTRACT A complete analytical model, which incorporates shear deformation as well as transverse ... more ABSTRACT A complete analytical model, which incorporates shear deformation as well as transverse normal thermal strains is assessed for the thermal stress analysis of cross-ply laminates subjected to linear or gradient thermal profile across thickness of the laminate. Primary displacement field is expanded in the thickness direction using twelve degrees of freedom. Equilibrium equations in the present higher order shear and normal deformation theory (HOSNT12) are variationally consistent and obtained using principle of virtual work [1]. Numerical results of displacements and stresses are compared with three dimensional (3D) elasticity solution and other two dimensional (2D) models.

Composite Structures, 2011

This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright

IUTAM Symposium on Multi-Functional Material Structures and Systems, 2009

Abstract Estimation of displacements and stresses in functionally graded (FG) beams and plates ar... more Abstract Estimation of displacements and stresses in functionally graded (FG) beams and plates are carried out using higher order shear and normal deformation theories (HOSNTs). Taylor's series expansion is adopted to approximate primary displacements in the thickness ...

Computers & Structures, 2008

An analytical solution, based on a higher order shear and normal deformation theory, is presented... more An analytical solution, based on a higher order shear and normal deformation theory, is presented for the cylindrical flexure of piezoelectric plates. The primary displacement terms are expanded in thickness coordinate and an exact nature of electric potential is obtained in actuator and sensing layers. The electric potential function is evaluated by solving a second order ordinary differential equation satisfying electric boundary conditions along thickness direction of piezoelectric layer. A unidirectional composite plate attached with distributed actuator and sensor layers is analyzed under electrical and mechanical loading conditions and comparison of results with exact solution is presented. Results for non-piezoelectric plates are also compared with elasticity and other solutions of cylindrical bending.

International Journal of Mechanics and Materials in Design, 2010

Composite Structures, 2013

A complete analytical model, which incorporates shear deformation as well as transverse normal th... more A complete analytical model, which incorporates shear deformation as well as transverse normal thermal strains is assessed for the thermal stress analysis of cross-ply laminates subjected to linear or gradient thermal profile across thickness of the laminate. Primary displacement field is expanded in the thickness direction using twelve degrees of freedom. Equilibrium equations in the present higher order shear and normal deformation theory (HOSNT12) are variationally consistent and obtained using principle of virtual work [1]. Numerical results of displacements and stresses are compared with three dimensional (3D) elasticity solution and other two dimensional (2D) models.