Thermal buckling analysis of skew fibre-reinforced composite and sandwich plates using shear deformable finite element models

This paper presents numerical simulation studies on the vibration and acoustic response characteristics of an isotropic rectangular plate in a thermal environment using commercial finite element softwares ANSYS and SYSNOISE. First the critical buckling temperature is obtained, followed by modal and harmonic analyses considering prestress due to the thermal field in the plate, with the critical buckling temperature as a parameter. The vibration response predicted is then used to compute the sound radiation. It is found that the displacement response of the structure increases with an increase in temperature for all boundary conditions. The overall sound radiation of the plate marginally increases with an increase in temperature for all boundary conditions when the temperature approaches the critical buckling temperature although there is a sharp increase in sound power levels.

Vibration and Acoustic Response of an Isotropic Plate in a Thermal Environment

http://repository.ias.ac.in/16083/1/391.pdf

Two shear deformable finite element models for buckling analysis of skew fibre-reinforced composite and sandwich panels

Free vibration of skew laminates

Buckling analysis of skew fibre-reinforced composite laminates based on first-order shear deformation plate theory

A general high precision triangular plate bending finite element has been extended to the buckling analysis of laminated skew plates. This procedure involves development of the transformation matrix between global and local degrees of freedom for nodes lying on the skew edges and suitable transformation of the element matrices. The accuracy of the present formulation has been verified against literature values. New results are obtained for antisymmetric angle-ply and cross-ply laminated skew plates. In this analysis, the critical buckling loads for different skew angles with various lamination parameters, such as number of layers, fibre orientation angle, different boundary (simply supported, clamped) and loading (uniaxial, biaxial) conditions, have been presented.

A.R. Krishna Reddy

Papers

Buckling of laminated skew plates