Elasto-plastic thermal stress analysis in symmetric thermoplastic laminates

Abstract

In this study, a thermal elastic-plastic stress analysis is carried out in steel fiber-reinforced symmetric thermoplastic laminated plates. The material is assumed to be strain-hardening. The orientation angles are chosen as, (0°/90°) s, (30°/ -30°) s, (45°-45°) s, (60°/-60°) s, (15°/0°) s, (30°/0°) s, (45°/0°) s, (60°/0°) s, (75°/0°) s. The Tsai-Hill theory is used as a yield criterion in the solution. Temperature distribution is chosen as +T 0 and -T 0 at the upper and lower surfaces, respectively. It is found that plastic yielding occurs at the same temperature; all the orientation angles and the plastic region expands the same at the same temperature.