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

摘要

In this paper, thermal elastic-plastic stress analysis is carried out on simiply supported antisymmetric cross-ply [0 deg /90 deg]_2 angle-ply [30 deg/-30 deg]_2, [45 deg/-45 deg]_2, [60 deg/-60 deg]_2, [15 deg/-15 deg]_2, [15 deg/-30 deg]_2, [15 deg/-45 deg]_2, [15 deg/-60 deg]_2 alumi-nium 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.