The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Huishen Shen - One of the best experts on this subject based on the ideXlab platform.
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postbuckling analysis of stiffened laminated cylindrical shells under combined external liquid pressure and axial compression
Engineering Structures, 1998Co-Authors: Huishen ShenAbstract:Abstract A postbuckling analysis is presented for a stiffened, laminated, thin cylindrical shell of finite length subjected to combined loading of external liquid pressure and axial compression. The Formulations are based on a boundary layer theory of shell buckling, which includes the effects of nonlinear prebuckling deFormations, nonlinear large deflections in the postbuckling range and initial geometrical imperfections of the shell. The ‘smeared stiffener’ approach is adopted for the stiffeners. The analysis uses a singular perturbation technique to determine the interactive buckling loads and postbuckling equilibrium paths. Numerical examples cover the perFormances of perfect and imperfect, stiffened and unstiffened cross-ply laminated cylindrical shells. Typical results are presented in dimensionless Graphical Form.
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post buckling analysis of imperfect stiffened laminated cylindrical shells under combined external pressure and axial compression
Computers & Structures, 1997Co-Authors: Huishen ShenAbstract:Abstract A post-buckling analysis is presented for a stiffened laminated cylindrical shell of finite length subject to combined loading of external pressure and axial compression. The Formulations are based on a boundary layer theory of shell buckling which includes the effects of the nonlinear pre-buckling deFormation, the nonlinear large deflection in the post-buckling range and the initial geometrical imperfection of the shell. The “smeared stiffener” approach is adopted for the stiffeners. The analysis uses a singular perturbation technique to determine the interactive buckling loads and the post-buckling equilibrium paths. Numerical examples cover the perFormances of perfect and imperfect, stiffened and unstiffened cross-ply laminated cylindrical shells. Typical results are presented in dimensionless Graphical Form.
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thermal postbuckling analysis of imperfect laminated plates on softening non linear elastic foundations
Composites Science and Technology, 1997Co-Authors: Huishen Shen, F W WilliamsAbstract:A thermal postbuckling analysis is presented for a simply supported, composite laminated plate subjected to uniForm or non-uniForm parabolic temperature loading and resting on a softening non-linear elastic foundation. The Formulation is based on the classical laminated plate theory and includes the plate-foundation interaction and thermal effects. The analysis uses a mixed Galerkin-perturbation technique to determine thermal buckling loads and postbuckling equilibrium paths, taking initial geometrical imperfections into account. Numerical examples cover the perFormance of perfect and imperfect, antisymmetric angle-ply and symmetric cross-ply laminated plates. Typical results are presented in dimensionless Graphical Form for different parameters and exhibit interesting imperfection sensitivity, e.g. the thermal postbuckling equilibrium path can be unstable.
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postbuckling analysis of cylindrical shells under combined external liquid pressure and axial compression
Thin-walled Structures, 1996Co-Authors: Huishen ShenAbstract:Abstract A postbuckling analysis is presented for a circular cylindrical shell of finite length which is subjected to combined loading of external liquid pressure and axial compression. The Formulations are based on a boundary layer theory which includes effects of the nonlinear prebuckling deFormation, the nonlinear large deflection in the postbuckling range and the initial geometrical imperfection of shells. The analysis uses a singular perturbation technique to determine interactive buckling loads and postbuckling equilibrium paths. Numerical examples are presented that relate to the perFormances of perfect and imperfect cylindrical shells. Typical results are presented in dimensionless Graphical Form.
T K Paul - One of the best experts on this subject based on the ideXlab platform.
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finite element evaluation of stress concentration factor of thick laminated plates under transverse loading
Computers & Structures, 1993Co-Authors: T K PaulAbstract:Abstract A displacement-based Formulation of an isoparametric quadratic quadrilateral element for the analysis of thick laminated plates is presented with the help of Lo-Christensen-Wu higher order bending theory. The finite element Formulation is then used for the analysis of in-plane stresses of a simply supported thick laminated plate containing two circular holes under transverse sinusoidal loading. The results obtained by this theory compare favourably with the exact elasticity solutions, which demonstrates the validity of the method. The variation of the stress concentration factor with respect to plate thickness, hole size, distance between holes is presented in Graphical Form and discussed.
Rajendar Kumar - One of the best experts on this subject based on the ideXlab platform.
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forced vibrations of non homogeneous rectangular plate of linearly varying thickness
Journal of Vibration and Control, 2014Co-Authors: Arun Gupta, Manisha Saini, Shiv Singh, Rajendar KumarAbstract:An analysis is presented of the forced vibrations of non-homogeneous rectangular plate of variable thickness on the basis of classical plate theory. The non-homogeneity of the plate material is assumed to arise due to the variation in density which is assumed to vary linearly. The thickness of the plate also varies linearly. Approximate Formulae are proposed for estimating the maximum deflection of a rectangular plate subject to a uniFormly distributed harmonic lateral load. Maximum deflection for the different values of the fundamental frequency of vibration is computed for a simply supported-free-simply supported-free plate for various values of taper constant, non-homogeneity constant and aspect ratios. Results are presented in Graphical Form.
Pragati Sharma - One of the best experts on this subject based on the ideXlab platform.
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study of temperature behaviour on thermally induced vibration of non homogeneous trapezoidal plate with bi linearly varying thickness
Journal of Applied Mathematics and Physics, 2016Co-Authors: Nbsp Kavita, Satish Kumar, Pragati SharmaAbstract:The main aim of the present work is to study the linear temperature behaviour of a non-homogeneous trapezoidal plate whose thickness varies linearly in both directions. The temperature behaviour considered linear along the length of the plate. Non-homogeneity in plate arises due to variation in density along the length of the plate. The two-term deflection function with clamped-simply supported-clamped-simply supported boundary condition is taken into consideration. The effect of structural parameters such as taper constants, thermal gradient, non-homogeneity constant and aspect ratio has been studied. Rayleigh-Ritz method is used to solve the governing differential equations and to obtain the fundamental frequencies for the first two modes of vibration. Results are presented in Graphical Form.
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study of thermally induced vibration of non homogeneous trapezoidal plate with parabolically thickness variation in both directions
Applied Mathematics-a Journal of Chinese Universities Series B, 2016Co-Authors: Satish Kumar, Pragati SharmaAbstract:The present analysis demonstrates the thermal effect on vibrations of a symmetric, non-homoge- neous trapezoidal plate with parabolically varying thickness in both directions. The variation in Young’s modulus and mass density is the main cause for the occurrence of non-homogeneity in plate’s material. In this consideration, density varies linearly in one direction. The governing differential equations have been derived by Rayleigh-Ritz method in order to attain fundamental frequencies. With C-S-C-S boundary condition, a two term deflection function has been considered. The effect of structural parameters such as taper constants, thermal gradient, aspect ratio and non-homogeneity constant has been investigated for first two modes of vibration. The obtained numerical results have been presented in tabular and Graphical Form.
N D Mittal - One of the best experts on this subject based on the ideXlab platform.
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finite element analysis for stress concentration and deflection in isotropic orthotropic and laminated composite plates with central circular hole under transverse static loading
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008Co-Authors: N K Jain, N D MittalAbstract:Abstract The distributions of stresses and deflection in rectangular isotropic, orthotropic and laminated composite plates with central circular hole under transverse static loading have been studied using finite element method. The aim of author is to analyze the effect of D / A ratio (where D is hole diameter and A is plate width) upon stress concentration factor (SCF) and deflection in isotropic, orthotropic and laminated composite plates under different transverse static loading condition. Analysis has been done for symmetric and anti-symmetric composite laminates. The results are obtained for three different boundary conditions. The variations of SCF and deflection with respect to D / A ratio are presented in Graphical Form and discussed. The finite element Formulation is carried out in the analysis section of the ANSYS package.
