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.

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