Thermal Elastic-Plastic Stress Analysis of Antisymmetric Aluminium Metal-Matrix Composite Laminated Plates Under Constant Temperature Change through the Thickness

Abstract

In this paper, thermal elastic-plastic stress analysis is carried out on simply supported antisymmetric cross-ply [0°/90°]2 and angle-ply [30°/−30°]2, [45°/−45°]2, [60°/−60°]2, [15°/−15°]2, [15°/−30°]2, [15°/−45°]2, [15°/−60°]2 aluminium metal-matrix laminated plates under constant temperature change through the thickness of plates. The plates are composed of four orthotropic layers bonded antisymmetrically. In the solution, a special computer program has been employed. The composite materials are assumed to be perfectly plastic. Tsai-Hill Theory is used as a yield criterion. Plastic and residual stresses are determined in the antisymmetric cross-ply and angle-ply laminated plates for small deformations. The intensity of stress components in the antisymmetric cross-ply laminated plate is higher than in angle-ply laminated plate due to the differences among the stiffnesses of layers. Plastic yielding occurs in all the laminated plates at the same temperature.