Elastic-Plastic Stress Analysis on Simply Supported Thermoplastic Laminated Plates Under Thermal Loads Varying Linearly

Abstract

In this study, elastic-plastic stress analysis is carried out on simply supported symmetric cross-ply [0 / 90]2 and angle-ply [30 / 30]2, [45 / 45]2, [60 / 60]2 thermoplastic laminated plates under thermal loads varying linearly through the thickness. An analytical solution is performed for satisfying thermal elastic-plastic stress-strain relations and boundary conditions for small plastic deformations. Tsai-Hill Criterion is used as a yield criterion. The composite material is assumed to be linear hardening. Residual stresses distributions along the thickness of the plates are obtained and presented in figures. All the residual stress moments are in balance with respect to middle plane of the laminates since they are symmetric in opposite signs.