Comparative study for material effect on stress behaviourial characteristics of rectangular plate (original) (raw)
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Stress analysis of rectangular and square plates with various cutouts
Vibroengineering PROCEDIA, 2019
The geometric irregularities present inside a structure results in an improper stress distribution caused during manufacturing, which not only affects the strength of the component but also its vibrational behaviour when operated in a fluctuating environment. The emphasis of this paper is to evaluate the stress behavioral characteristics of plates with different cutout shapes. Two different loading conditions with three different types of plates made of Mild Steel are used for this analysis. From the present investigation, it may be concluded that where the max stress occurs. The methodology adopted in this research work is based on the numerical technique of finite element method, which uses SOLID 185 in ANSYS 19.1 solver. For further analysis, the obtained results are validated with previous literature works which were found satisfactory when related to the present study. It may be noted that FEM provides good insight for the determination of stress and deflection, with different ...
Material Effect on Stress Behavioural Characteristics of Composite Rectangular Plate
IOP Conference Series: Materials Science and Engineering
A nu merical study has been carried out to examine the effects of the material on stress behavioural characteristics of a rectangular plate with and without cutout for a conventional and composite material plate subjected to pressure loads using finite element method.Further, this paper addresses the effect of various boundary conditions applied to the plate. A comparison has been made between the conventional and composite material with and without the cutout. It is observed that the application of pressure loads and boundary conditions have a substantial influence on stress behavioural characteristics of a rectangular plate with and without cutout on both the materials. The results obtained from numerical simulat ion are compared and found that simu lation results are in good agreement with the previous studies.
A Review on Stress Analysis of an Infinite Plate with Cutouts in Composite Materials
2014
In this paper an effort is made to review the investigations that have been made on the "Stress Analysis of an Infinite Plate with Two Square or Rectangular Cutouts in Composite Materials". To reduce the weight of the system, different cutout shapes are required to make in structural elements. These discontinuities are weakening agent for the structure or machine. The presence of a cutout complicates the stress distribution in the plate so stress field around such hole must be known under different loading conditions. A number of analytical and experimental techniques are available for stress analysis around the different types of cutouts for different condition in an infinite plate, made up of different materials under different loading condition has been reported in this article. The methods compared are tabulated with their findings. Singularities of square and rectangular hole in rectangular plate are considered in present study.
International Journal of Ocean System Engineering, 2011
Perforated plates with cutouts (or holes) are widely used in structural members. These cutouts provide stress concentration in plates. Extensive studies have been carried out on stress concentration in perforated plates, which consider cutout shapes, boundary conditions, bluntness of cutouts, and more. This study presents stress concentration analyses of perforated plates with not only various cutouts and bluntness but also different cutout orientations. Especially, the effect of cutout orientation on stress concentration is emphasized since structural members have become more complicated recently. To obtain stress concentration patterns, a finite element program, ANSYS, is used. For the designated goal, three parameters are considered as follows: the shapes of polygonal cutouts (circle, triangle, and square), bluntness (a counter measure of radius ratio, r/R), and rotation of cutouts (θ). From the analyses, it is shown that, in general, as bluntness increases, the stress concentration increases, regardless of the shape and rotation. A more important finding is that the stress concentration increases as the cutouts become more oriented from the baseline, which is the positive horizontal axis (+x). This fact demonstrates that the orientation is also a relatively significant design factor to reduce stress concentration. In detail, in the case of the triangle cutout, orienting one side of the triangle cutout to be perpendicular to the applied tensile forces is preferable. Similarly, in the case of the square cutout, it is more advantageous to orient two sides of square cutout to be perpendicular to the applied tensile force. Therefore, at the design stage, determining the direction of a major tensile force is required. Then, by aligning those polygon cutouts properly, we can reduce stress concentration.
Archive of Applied Mechanics, 2018
The current work focuses on extending the analytical solution given by Greszczuk to determine the stress distribution in multilayered composite plates subjected to arbitrary in-plane loadings. This is achieved by introducing an arbitrary oriented uniaxial, biaxial, and shear loading conditions into Greszczuk solution. The present solution has exactly reproduced most of the results of the analytical solution existing in the literature. The varying parameters, such as fiber orientation angle, type and load orientation, stacking sequence, and anisotropic modulus ratio E 1 /E 2 , are examined. In the second part of this study, digital image correlation (DIC) technique is used to obtain full-field surface strain measurements in unidirectional E-glass/epoxy specimens with different fiber orientation angles, in order to show its effect on stress concentration and failure modes. The analytical results obtained by the present solution compare favorably with those obtained using DIC technique. Compared to the experimental data, the accuracy of the present approach is within 10%. The simplicity of the present solution gives the design engineer a useful tool for optimizing laminate plates in the presence of a circular cutout.
Effect of Stress and Load Distribution Analysis on an Isotropic Rectangular Plate
2021
Structural failure is discovered to be attributed to the inability of the designer to determine the structural load (critical load) that causes it. The aim of this study is to develop a mathematical model for calculation of the critical lateral imposed load of the plate before deflection reaches the maximum specified limit and its corresponding critical lateral imposed load before plate reaches an elastic yield point . Total potential energy equation of a thick plate was formulated from the static elastic theory of the plate. Direct variation method of analysis was adopted by minimizing the total potential energy obtained to determine the expression for the deflection and shear deformation. By solving the formulated expression, the effect of stress and load distribution analysis of a mild steel rectangular plate with one edge clamped, free at the other and the other opposite edge simply supported (CSFS) are analyzed and discussed. From the established equation, a new model for determination of the critical lateral imposed load of the plate is developed. The result showed that: (i) as the specified thickness of the plate increases, the value of critical lateral imposed load increase (ii) the critical lateral imposed load decrease as the plates span increases. iii) the critical lateral imposed load increase as the plate thickness increases. (iv) increase in the value of the allowable deflection value required for the analysis of the plate reduces the chances of failure of a structural member. It is concluded that the values of critical lateral load obtained by this theory achieve accepted vertical shear stress to the thickness of plate variation and satisfied the transverse flexibility of the condition of the plate while predicting the flexural characteristics for an isotropic rectangular CSFS plate. Numerical comparison was conducted to verify and demonstrate the efficiency of the present theory. The results obtained are in good agreement with those in the literature. This approach is recommended to the practicing engineers as it overcomes the challenges of the conventional practice in the structural analysis/design which involves checking of deflection and shear; the process which is proved unreliable.
International Journal of Energy and Environment, 2016
In this study, the experimental and numerical work is presented to study the effect of cut out size, shape, and number on the deflection and stresses in x and y-directions for simply and clamped supported boundary condition of cross and angle-ply laminated plates. The experimental work involved the effect of the cut out size, shape, and number on the deflection and stresses. A comparison study for the deflection and stress results have been achieved between the experimental and those obtained numerically using the finite element method employing ANSYS program Ver. 14. Various support conditions for the plates were adopted with different number of layers and fiber orientations. The shapes of cut out are square, circular, and fillet for different aspect ratios AR=1 and 2. The results showed that the amplitude values of square one are less than that for other types in cross-ply laminated plates and more than that for other cutouts in angle-ply laminated plates for aspect ratio a/b=1. Also the amplitude values of plates with square hole are more than that for circular hole for laminated plates with aspect ratio a/b=2. The stresses increase with increasing of the cutout size, and the increasing of fillet radius decreases the stresses. The comparison study shows a maximum discrepancy of deflection about (9.54%) and maximum discrepancy of stress results about (12.45%).
Journal of The Institution of Engineers (India): Series C, 2018
The design of high-performance composite structures frequently includes discontinuities to reduce the weight and fastener holes for joining. Understanding the behavior of perforated laminates is necessary for structural design. In the current work, stress concentrations taking place in laminated and isotropic plates subjected to tensile load are investigated. The stress concentrations are obtained using a recent quadrilateral finite element of four nodes with 32 DOFs. The present finite element (PE) is a combination of two finite elements. The first finite element is a linear isoparametric membrane element and the second is a high precision Hermitian element. One of the essential objectives of the current investigation is to confirm the capability and efficiency of the PE for stress determination in perforated laminates. Different geometric parameters, such as the cutout form, sizes and cutout orientations, which have a considerable effect on the stress values, are studied. Using the present finite element formulation, the obtained results are found to be in good agreement with the analytical findings, which validates the capability and the efficiency of the proposed formulation. Finally, to understand the material parameters effect such as the orientation of fibers and degree of orthotropy ratio on the stress values, many figures are presented using different ellipse major to minor axis ratio. The stress concentration values are considerably affected by increasing the orientation angle of the fibers and degree of orthotropy.
Buckling Analysis Of Rectangular Plates With Cutouts And Partial Edge Compression
IARJSET, 2015
In the present paper, buckling behavior of rectangular plates with cutouts at different locations and subjected to partial edge compression is investigated. The plate is modeled and results are obtained using ANSYS. Buckling behavior of plates is investigated for simply supported. The work is further extended for different kinds of partial edge compressions. Partial edge compression is applied in such a way that total load on plate remains same for each case. Several numerical results depicting the non-dimensional buckling load for rectangular plates are presented in the form of figures and tables. In order to check the accuracy of the present method, the results are compared with those existing in the literature. The effect of span to thickness ratio and boundary conditions on the buckling load is presented.
Stress around square and rectangular cutouts in symmetric laminates
The solution presented in this paper is useful for finding the stress distribution around holes in symmetric laminates as well as in isotropic plates and also to determine the failure strength of the laminate on first ply failure basis by Tsai-Hill, Hashin-Rotem and Tsai-Wu criteria. This is a one stop solution for all kinds of in-plane loading on symmetric laminates as well as isotropic plates with any shape of cutout. Using Savin's basic solution for anisotropic plates, the stress functions are derived for generalized mapping function for the hole and arbitrarily oriented in-plane loading. Square and rectangular holes in symmetric laminates of Graphite/epoxy and Glass/epoxy are studied. It is noted that the maximum stress and its location is mainly influenced by the type of loading. Larger stresses are noted for shear loading. The stress results are also obtained by ANSYS for comparison.