Atef Eraky - Academia.edu (original) (raw)
Papers by Atef Eraky
Design Engineering, Aug 4, 2021
Egyptian Journal for Engineering Sciences and Technology, 2021
This work presents a review on solution methods and analysis of nanoplates structures with differ... more This work presents a review on solution methods and analysis of nanoplates structures with different boundary conditions and load cases, under some effects such as magnetic field and the effect of other parameters on the vibration and analysis. Moreover, it represents a review about the theories that are used to study these nanoplates structures such; the nonlocal elasticity theory by Eringen which is introduced to take into consideration the small scale effect of such nano-structure. The equation of motion of the nanoplate is derived then it used to study this type of nano-structures. Nanoplates are used in a lot of branches of life and in different applications because of the high and excellent mechanical, thermal and electrical properties of these nanoplates. Applications of nanoplate structure are also introduced to show the importance of studying and getting a solution of such nanoplates. Also, some parametric studies are discussed to show the effect of the studied parameters on the dynamic behaviour and analysis of these nanoplates.
Damage detection techniques have been recognized as an important non-destructive tool for the ide... more Damage detection techniques have been recognized as an important non-destructive tool for the identification of damage in structures for several years. This paper proposed a method of locating and quantifying the damage in structural members using the concept of prediction algorithm along with normalized residual function employed to formulate the objective function. Two-point crossover binary coded genetic algorithm (GA) combined with artificial Intelligence continuing search algorithms, in minimum constraint function (Fmin.con.). Sequential Quadratic Programming (SQP), Interior-point, Active set, each one alone or hybrid with GA, used in minimizing the objective function and optimum set of stiffness reduction parameters. The optimum sensors locations were determined using strain energy equation. The proposed technique was incorporated into MATLAB code and applied to selected problems. Results of actual supposed damage using site full measurements and limited measurements, using the proposed method, are compared. From the proposed method results, it is observed that it to gives clear identification of damage locations, and quantities using limited sensor locations.
Tobacco Regulatory Science, 2021
Detection of stresses in structures is widely required. Acoustic stress measurement is a NonDestr... more Detection of stresses in structures is widely required. Acoustic stress measurement is a NonDestructive Evaluation (NDE) method. In this paper wave propagation in a stressed plate is studied, using numerical simulations. We used ABAQUS, a commercial finite element software, to model the plate. Many parameters affect the wave propagation as plate thickness, plate length, and frequency of the wave signal are studied. When compressive and tensile loads are applied to a plate, the wave propagation is investigated. It was concluded that the effect of stress on the wave propagation decreases with increasing plate length and also with increasing plate thickness, wherewith increasing frequency the effect of stress in wave propagation is clearer.
Earthquake Engineering aims to reduce seismic risks resulting from earthquakes and facilitate the... more Earthquake Engineering aims to reduce seismic risks resulting from earthquakes and facilitate the process of designing earthquake-resistant buildings. Evaluation of seismic vulnerability of structures is of most importance due to the increase number of seismic events that causes significant losses and damages. The capacity spectrum method (CSM) is a nonlinear static analysis method suggested by several regulations such as the ATC and FEMA, which compares the global force-displacement capacity curve of a structure with an earthquake response spectrum in graphical bases. In this paper, the capacity spectrum method is investigated and applied to buildings through the development of robust database including large stock of historical earthquakes. The developed database is customized in the vulnerability assessment of different example buildings with emphasize on the characteristics leading to the alteration of seismic vulnerability class. The results are presented in formValuable to pra...
Atef Eraky, Tharwat A. Sakr, and Riham Khalifa Abstract— Accidental explosions are frequently enc... more Atef Eraky, Tharwat A. Sakr, and Riham Khalifa Abstract— Accidental explosions are frequently encountered nowadays due to several reasons as gas vehicles, military works and terrorist attacks. This paper introduces a study of the effects of accidental explosions in front of façade columns of RC buildings and their mitigation. Nonlinear finite element analysis is carried out on space frame due to the rapid release of energy in the form of light, heat, sound, and a shock wave resulting from explosion. The spherical free-air bursts of TNT detonation and expansion of the spherical charges are developed using a one dimensional Euler wedge through the ANSYS AUTODYN software. Different cases of charge weights (500 and 1000 kg TNT) and stand-off distances (3, 5 and 10 m) are used in the study. Overpressure, displacements, stresses, and damage index are the common response parameters investigated. Interior shear walls are applied as common mitigation techniques and their effects on the build...
The most important property of a base-isolation system is to make the base more flexible than the... more The most important property of a base-isolation system is to make the base more flexible than the elements of the superstructure, but it must still be stiff enough to resist typical pounding forces, wind loadings, and similar low-amplitude horizontal forces. However, the potential consequences of earthquake-induced poundings on seismically isolated buildings can be much more substantial, and, thus, should be assessed. This paper investigates, through numerical simulations, the effects of potential pounding incidences on the seismic response of a typical seismically isolated building and to make the control system with hydraulic viscous damper to reduce the transmitted energy. A specialized software application has been developed in order to efficiently perform numerical simulations and parametric studies on the control system. The effects of certain parameters, such as the post-pre stiffness ratio, plastic shear capacity of the viscous and damper the characteristics of the adjacent ...
International journal of applied mathematics and statistics, 2017
In this work the eigenvalue problem is formulated as an optimization problem of a second degree s... more In this work the eigenvalue problem is formulated as an optimization problem of a second degree surface. Lagrange multiplier technique is employed, such that the eigenvalues and eigenvectors are exactly obtained. The obtained results agreed with that of the previous techniques. A flowchart and Matlab program are introduced to simplify the proposed technique. Further, the proposed technique is applied for vibration analysis of two different plate configurations.
Before the 1990s, numerous existing buildings, built with steel beam-column connections, needed r... more Before the 1990s, numerous existing buildings, built with steel beam-column connections, needed retrofitting to be safe during the coming earthquakes and withstand dynamic effects in general. The purpose of this research is to improve the unique advantages of shape memory alloy as an alternative material for bolts in steel beamcolumn connections. Three-dimensional non-linear finite element models of steel beam-column connections are subjected to a load system applied at the tip of the cantilever beam. The study is conducted to examine the effect of changing initial and final transformation stresses of SMA bolts and investigate their impacts on energy dissipation of the joint in flexural behavior.
The progressive collapse of building structures is initiated when one or more vertical load carry... more The progressive collapse of building structures is initiated when one or more vertical load carrying members (typically columns) is removed. Once a column is removed due to a vehicle impact, fire, earthquake, or other man-made or natural hazards, the building’s weight (gravity load) transfers to neighboring elements in the structure. If these elements are not properly designed to resist and redistribute the additional gravity load the vertical load carrying elements of the structure continue to fail until the additional loading is stabilized causing greater damage to the structure than the initial cause. This paper aims to study the progressive collapse of multi-story buildings and how it can be affected by the statical system of the building. The alternate path method is applied to an analytical model of space frames five-story, five -bays RC frame with different statical systems using linear and non-linear static analysis. The study focuses on the behavior of space frames due to t...
Efficient and accurate determination of eigenvalues and eigenvectors, occupies a respected resear... more Efficient and accurate determination of eigenvalues and eigenvectors, occupies a respected research area. Vibration and buckling analysis of engineering components, directly depend on such values. The present work designs a numerical scheme to determine eigenvalues and eigenvectors. The method employs special iterations technique for each vector, separately. This technique can lead to the largest eigenvalue then the smaller one. Accuracy of the obtained results are very good compared with that were obtained by previous methods. Further, modeling and algorithm are presented through a module of MatLab. As well as, several examples are solved to examine efficiency and accuracy of the proposed sheme.
weight optimization of trusses is so important due to economic and sustainability considerations.... more weight optimization of trusses is so important due to economic and sustainability considerations. Geometry, topology and sizing optimization is extensively found in literature. Applications found in literature uses the traditional deign variables containing node coordinates, elements connectivity and member cross sections. This paper presents an approach based on the genetic algorithm for optimum design of plane and space trusses subjected to specified set of constraints. The proposed approach defined innovative design variables in terms of node coordinates and displacements. Such limited design variables lead to the reduction of genotype length resulting in less execution time. Topology and cross sections are estimated after using strength criteria. The proposed approach was applied on benchmark problems repeated in literature, the proposed approach resulted in more optimized results with less mathematical effort.
Tensegrity structure is a special type of pin jointed frame (truss), in which the tension members... more Tensegrity structure is a special type of pin jointed frame (truss), in which the tension members were replaced by cables. It can be defined as (a compression members in sea of tension). This type of structures features by light weight, covering large span, self-stressed, and it is deployable. This paper sheds light on the tensegrity structures of several destinations historical, benefits, usage, analysis and design. Also a comparison between tensegrity dome structures and trussed dome structures is presented, for 100 m dome span. When the effects of change of some parameters as number of tangential and radial division, inclination of upper and diagonal chord is studied. Also the searching for the optimum case was done.
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING AND TECHNOLOGY (IJCIET), 2020
This paper detects, through numerical simulations, the stress in structures using lamb waves. The... more This paper detects, through numerical simulations, the stress in structures using lamb waves. The finite element model of steel plate was developed using the commercial finite element programs ABAQUS and ANSYS. Dynamic models were run for Lamb wave propagation in steel plate under the effect of different compressive and tensile stresses. The simulations have revealed that with the variation of stress there is no effect of time of flight. In the case of compressive stress, it's found that the amplitude of received wave is increased slightly with increasing of compressive stress. In otherwise of tensile stress, the amplitude of received wave is also decreased slightly with increasing of tensile stress.
Egyptian Journal for Engineering Sciences and Technology, 2020
The dynamic interaction between the bridge and the passing vehicle or train is considered a point... more The dynamic interaction between the bridge and the passing vehicle or train is considered a point of interest concerning the railway bridge design and maintenance, and the interest becomes greater for the bridges serving as links on high-speed lines. In this paper, the interaction problem is presented through the different models used to describe the phenomenon and the different techniques adopted to solve the non-linear interaction problem. The models describing the problem vary greatly from very simple 2D models with moving loads over beams to complex 3D models with multiple degrees of freedom (DOFs) for both the bridge and vehicle and with precise definition of various parts and parameters affecting the response such as the type of bridge element, the track structure and the bridge elastic supports. The solution algorithms of the non-linear interaction problem also vary from simple analytic solutions and non-direct techniques to more sophisticated iterative techniques in finite element (FE) domains.
HBRC Journal, 2016
Structural health monitoring is essential to maintain the structural integrity by predicting prob... more Structural health monitoring is essential to maintain the structural integrity by predicting problems in an early time. This consequently could be reflected on extending the life time of structures. Nondestructive tests based on dynamic measures are usually fast and economic in detecting damages of structures. Various numerical techniques together with recording time histories are used for this purpose. This paper presents a numerical method for damage detection in plate-like structures. The modeling of damage was conducted commercially using the module of MatLab. Comparison of different mode shapes was used in the analysis to detect the location of local damage based on residual force vector. The technique utilized the node residual force vector to locate and evaluate the degree of the suspected damaged elements. In the current study, three configurations for plates were used. The study also concentrated on the efficiency of the new method in identifying damages of different degradation levels. The plates were subjected to different combinations of artificial damages applied at various positions on each plate. The study was not only able to identify the location but also the degree of damage in plates. It has been noted that identification of severe degradation was more precisely identified. As a result, the residual force method is the simplest damage quantification technique which approved to be accurate enough to be used in practical applications.
Egyptian Journal for Engineering Sciences and Technology, 2021
This paper presents a review on a displacement-based method of structural analysis. In Applied El... more This paper presents a review on a displacement-based method of structural analysis. In Applied Element Method (AEM), the structure is simulated as an assembly of elements formed by dividing the structure virtually. These elements are connected in both normal and tangential directions by springs. AEM can be used to analyze structural behavior from the initial loading until total collapse. It combines between the advantages of Finite Element Method (FEM) and Discrete Element Method (DEM). In this paper, the differences between AEM and the other numerical methods are discussed. Next, basic introduction to AEM and its assumptions are presented. The element formulation and the effect of number of the connecting springs between elements in addition to the element size are illustrated. Finally, applications of AEM such as cyclic loading condition, dynamic small and large deformation range, creep theory, functionally graded material, masonry building and fiber reinforced polymer and polypropylene composite are explained.
IAEME PUBLICATION, 2020
This paper detects, through numerical simulations, the stress in structures using lamb waves. The... more This paper detects, through numerical simulations, the stress in structures using lamb waves. The finite element model of steel plate was developed using the commercial finite element programs ABAQUS and ANSYS. Dynamic models were run for Lamb wave propagation in steel plate under the effect of different compressive and tensile stresses. The simulations have revealed that with the variation of stress there is no effect of time of flight. In the case of compressive stress, it's found that the amplitude of received wave is increased slightly with increasing of compressive stress. In otherwise of tensile stress, the amplitude of received wave is also decreased slightly with increasing of tensile stress
Design Engineering, Aug 4, 2021
Egyptian Journal for Engineering Sciences and Technology, 2021
This work presents a review on solution methods and analysis of nanoplates structures with differ... more This work presents a review on solution methods and analysis of nanoplates structures with different boundary conditions and load cases, under some effects such as magnetic field and the effect of other parameters on the vibration and analysis. Moreover, it represents a review about the theories that are used to study these nanoplates structures such; the nonlocal elasticity theory by Eringen which is introduced to take into consideration the small scale effect of such nano-structure. The equation of motion of the nanoplate is derived then it used to study this type of nano-structures. Nanoplates are used in a lot of branches of life and in different applications because of the high and excellent mechanical, thermal and electrical properties of these nanoplates. Applications of nanoplate structure are also introduced to show the importance of studying and getting a solution of such nanoplates. Also, some parametric studies are discussed to show the effect of the studied parameters on the dynamic behaviour and analysis of these nanoplates.
Damage detection techniques have been recognized as an important non-destructive tool for the ide... more Damage detection techniques have been recognized as an important non-destructive tool for the identification of damage in structures for several years. This paper proposed a method of locating and quantifying the damage in structural members using the concept of prediction algorithm along with normalized residual function employed to formulate the objective function. Two-point crossover binary coded genetic algorithm (GA) combined with artificial Intelligence continuing search algorithms, in minimum constraint function (Fmin.con.). Sequential Quadratic Programming (SQP), Interior-point, Active set, each one alone or hybrid with GA, used in minimizing the objective function and optimum set of stiffness reduction parameters. The optimum sensors locations were determined using strain energy equation. The proposed technique was incorporated into MATLAB code and applied to selected problems. Results of actual supposed damage using site full measurements and limited measurements, using the proposed method, are compared. From the proposed method results, it is observed that it to gives clear identification of damage locations, and quantities using limited sensor locations.
Tobacco Regulatory Science, 2021
Detection of stresses in structures is widely required. Acoustic stress measurement is a NonDestr... more Detection of stresses in structures is widely required. Acoustic stress measurement is a NonDestructive Evaluation (NDE) method. In this paper wave propagation in a stressed plate is studied, using numerical simulations. We used ABAQUS, a commercial finite element software, to model the plate. Many parameters affect the wave propagation as plate thickness, plate length, and frequency of the wave signal are studied. When compressive and tensile loads are applied to a plate, the wave propagation is investigated. It was concluded that the effect of stress on the wave propagation decreases with increasing plate length and also with increasing plate thickness, wherewith increasing frequency the effect of stress in wave propagation is clearer.
Earthquake Engineering aims to reduce seismic risks resulting from earthquakes and facilitate the... more Earthquake Engineering aims to reduce seismic risks resulting from earthquakes and facilitate the process of designing earthquake-resistant buildings. Evaluation of seismic vulnerability of structures is of most importance due to the increase number of seismic events that causes significant losses and damages. The capacity spectrum method (CSM) is a nonlinear static analysis method suggested by several regulations such as the ATC and FEMA, which compares the global force-displacement capacity curve of a structure with an earthquake response spectrum in graphical bases. In this paper, the capacity spectrum method is investigated and applied to buildings through the development of robust database including large stock of historical earthquakes. The developed database is customized in the vulnerability assessment of different example buildings with emphasize on the characteristics leading to the alteration of seismic vulnerability class. The results are presented in formValuable to pra...
Atef Eraky, Tharwat A. Sakr, and Riham Khalifa Abstract— Accidental explosions are frequently enc... more Atef Eraky, Tharwat A. Sakr, and Riham Khalifa Abstract— Accidental explosions are frequently encountered nowadays due to several reasons as gas vehicles, military works and terrorist attacks. This paper introduces a study of the effects of accidental explosions in front of façade columns of RC buildings and their mitigation. Nonlinear finite element analysis is carried out on space frame due to the rapid release of energy in the form of light, heat, sound, and a shock wave resulting from explosion. The spherical free-air bursts of TNT detonation and expansion of the spherical charges are developed using a one dimensional Euler wedge through the ANSYS AUTODYN software. Different cases of charge weights (500 and 1000 kg TNT) and stand-off distances (3, 5 and 10 m) are used in the study. Overpressure, displacements, stresses, and damage index are the common response parameters investigated. Interior shear walls are applied as common mitigation techniques and their effects on the build...
The most important property of a base-isolation system is to make the base more flexible than the... more The most important property of a base-isolation system is to make the base more flexible than the elements of the superstructure, but it must still be stiff enough to resist typical pounding forces, wind loadings, and similar low-amplitude horizontal forces. However, the potential consequences of earthquake-induced poundings on seismically isolated buildings can be much more substantial, and, thus, should be assessed. This paper investigates, through numerical simulations, the effects of potential pounding incidences on the seismic response of a typical seismically isolated building and to make the control system with hydraulic viscous damper to reduce the transmitted energy. A specialized software application has been developed in order to efficiently perform numerical simulations and parametric studies on the control system. The effects of certain parameters, such as the post-pre stiffness ratio, plastic shear capacity of the viscous and damper the characteristics of the adjacent ...
International journal of applied mathematics and statistics, 2017
In this work the eigenvalue problem is formulated as an optimization problem of a second degree s... more In this work the eigenvalue problem is formulated as an optimization problem of a second degree surface. Lagrange multiplier technique is employed, such that the eigenvalues and eigenvectors are exactly obtained. The obtained results agreed with that of the previous techniques. A flowchart and Matlab program are introduced to simplify the proposed technique. Further, the proposed technique is applied for vibration analysis of two different plate configurations.
Before the 1990s, numerous existing buildings, built with steel beam-column connections, needed r... more Before the 1990s, numerous existing buildings, built with steel beam-column connections, needed retrofitting to be safe during the coming earthquakes and withstand dynamic effects in general. The purpose of this research is to improve the unique advantages of shape memory alloy as an alternative material for bolts in steel beamcolumn connections. Three-dimensional non-linear finite element models of steel beam-column connections are subjected to a load system applied at the tip of the cantilever beam. The study is conducted to examine the effect of changing initial and final transformation stresses of SMA bolts and investigate their impacts on energy dissipation of the joint in flexural behavior.
The progressive collapse of building structures is initiated when one or more vertical load carry... more The progressive collapse of building structures is initiated when one or more vertical load carrying members (typically columns) is removed. Once a column is removed due to a vehicle impact, fire, earthquake, or other man-made or natural hazards, the building’s weight (gravity load) transfers to neighboring elements in the structure. If these elements are not properly designed to resist and redistribute the additional gravity load the vertical load carrying elements of the structure continue to fail until the additional loading is stabilized causing greater damage to the structure than the initial cause. This paper aims to study the progressive collapse of multi-story buildings and how it can be affected by the statical system of the building. The alternate path method is applied to an analytical model of space frames five-story, five -bays RC frame with different statical systems using linear and non-linear static analysis. The study focuses on the behavior of space frames due to t...
Efficient and accurate determination of eigenvalues and eigenvectors, occupies a respected resear... more Efficient and accurate determination of eigenvalues and eigenvectors, occupies a respected research area. Vibration and buckling analysis of engineering components, directly depend on such values. The present work designs a numerical scheme to determine eigenvalues and eigenvectors. The method employs special iterations technique for each vector, separately. This technique can lead to the largest eigenvalue then the smaller one. Accuracy of the obtained results are very good compared with that were obtained by previous methods. Further, modeling and algorithm are presented through a module of MatLab. As well as, several examples are solved to examine efficiency and accuracy of the proposed sheme.
weight optimization of trusses is so important due to economic and sustainability considerations.... more weight optimization of trusses is so important due to economic and sustainability considerations. Geometry, topology and sizing optimization is extensively found in literature. Applications found in literature uses the traditional deign variables containing node coordinates, elements connectivity and member cross sections. This paper presents an approach based on the genetic algorithm for optimum design of plane and space trusses subjected to specified set of constraints. The proposed approach defined innovative design variables in terms of node coordinates and displacements. Such limited design variables lead to the reduction of genotype length resulting in less execution time. Topology and cross sections are estimated after using strength criteria. The proposed approach was applied on benchmark problems repeated in literature, the proposed approach resulted in more optimized results with less mathematical effort.
Tensegrity structure is a special type of pin jointed frame (truss), in which the tension members... more Tensegrity structure is a special type of pin jointed frame (truss), in which the tension members were replaced by cables. It can be defined as (a compression members in sea of tension). This type of structures features by light weight, covering large span, self-stressed, and it is deployable. This paper sheds light on the tensegrity structures of several destinations historical, benefits, usage, analysis and design. Also a comparison between tensegrity dome structures and trussed dome structures is presented, for 100 m dome span. When the effects of change of some parameters as number of tangential and radial division, inclination of upper and diagonal chord is studied. Also the searching for the optimum case was done.
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING AND TECHNOLOGY (IJCIET), 2020
This paper detects, through numerical simulations, the stress in structures using lamb waves. The... more This paper detects, through numerical simulations, the stress in structures using lamb waves. The finite element model of steel plate was developed using the commercial finite element programs ABAQUS and ANSYS. Dynamic models were run for Lamb wave propagation in steel plate under the effect of different compressive and tensile stresses. The simulations have revealed that with the variation of stress there is no effect of time of flight. In the case of compressive stress, it's found that the amplitude of received wave is increased slightly with increasing of compressive stress. In otherwise of tensile stress, the amplitude of received wave is also decreased slightly with increasing of tensile stress.
Egyptian Journal for Engineering Sciences and Technology, 2020
The dynamic interaction between the bridge and the passing vehicle or train is considered a point... more The dynamic interaction between the bridge and the passing vehicle or train is considered a point of interest concerning the railway bridge design and maintenance, and the interest becomes greater for the bridges serving as links on high-speed lines. In this paper, the interaction problem is presented through the different models used to describe the phenomenon and the different techniques adopted to solve the non-linear interaction problem. The models describing the problem vary greatly from very simple 2D models with moving loads over beams to complex 3D models with multiple degrees of freedom (DOFs) for both the bridge and vehicle and with precise definition of various parts and parameters affecting the response such as the type of bridge element, the track structure and the bridge elastic supports. The solution algorithms of the non-linear interaction problem also vary from simple analytic solutions and non-direct techniques to more sophisticated iterative techniques in finite element (FE) domains.
HBRC Journal, 2016
Structural health monitoring is essential to maintain the structural integrity by predicting prob... more Structural health monitoring is essential to maintain the structural integrity by predicting problems in an early time. This consequently could be reflected on extending the life time of structures. Nondestructive tests based on dynamic measures are usually fast and economic in detecting damages of structures. Various numerical techniques together with recording time histories are used for this purpose. This paper presents a numerical method for damage detection in plate-like structures. The modeling of damage was conducted commercially using the module of MatLab. Comparison of different mode shapes was used in the analysis to detect the location of local damage based on residual force vector. The technique utilized the node residual force vector to locate and evaluate the degree of the suspected damaged elements. In the current study, three configurations for plates were used. The study also concentrated on the efficiency of the new method in identifying damages of different degradation levels. The plates were subjected to different combinations of artificial damages applied at various positions on each plate. The study was not only able to identify the location but also the degree of damage in plates. It has been noted that identification of severe degradation was more precisely identified. As a result, the residual force method is the simplest damage quantification technique which approved to be accurate enough to be used in practical applications.
Egyptian Journal for Engineering Sciences and Technology, 2021
This paper presents a review on a displacement-based method of structural analysis. In Applied El... more This paper presents a review on a displacement-based method of structural analysis. In Applied Element Method (AEM), the structure is simulated as an assembly of elements formed by dividing the structure virtually. These elements are connected in both normal and tangential directions by springs. AEM can be used to analyze structural behavior from the initial loading until total collapse. It combines between the advantages of Finite Element Method (FEM) and Discrete Element Method (DEM). In this paper, the differences between AEM and the other numerical methods are discussed. Next, basic introduction to AEM and its assumptions are presented. The element formulation and the effect of number of the connecting springs between elements in addition to the element size are illustrated. Finally, applications of AEM such as cyclic loading condition, dynamic small and large deformation range, creep theory, functionally graded material, masonry building and fiber reinforced polymer and polypropylene composite are explained.
IAEME PUBLICATION, 2020
This paper detects, through numerical simulations, the stress in structures using lamb waves. The... more This paper detects, through numerical simulations, the stress in structures using lamb waves. The finite element model of steel plate was developed using the commercial finite element programs ABAQUS and ANSYS. Dynamic models were run for Lamb wave propagation in steel plate under the effect of different compressive and tensile stresses. The simulations have revealed that with the variation of stress there is no effect of time of flight. In the case of compressive stress, it's found that the amplitude of received wave is increased slightly with increasing of compressive stress. In otherwise of tensile stress, the amplitude of received wave is also decreased slightly with increasing of tensile stress