Thermoelastic-Plastic Stress Analysis in a Thermoplastic Composite Disc

Abstract

In this study, an elastic-plastic stress analysis is carried out on a steel fiber-reinforced thermoplastic composite disc under uniform thermal distribution. The composite disc is reinforced by steel fibers curvilinearly. Its mechanical properties are obtained by strain gauges and Instron test machine. The modulus of elasticity in the tangential direction is measured by fitting a solid disc to the composite disc, exactly. However, other material properties are found approximately. The material is assumed to be non work hardening. Stresses are determined for uniform temperature distribution. The magnitude of the tangential stress component in polar coordinates is the highest at the inner points of the disc. Plastic solution is performed numerically. Plastic region begins at the inner surface of the disc. The residual stress component of the tangential stress is the highest at the inner surface of the disc.