Estimation of Elastoplastic Thermal and Residual Stresses in a Thermoplastic Composite Disc Under Uniform Temperature Effect

Abstract

In this study, an elastoplastic thermal stress analysis has been carried out on a thermoplastic composite disc that is unidirectionally reinforced by steel fibers. The finite element method (FEM) was used to compute thermal elastic and elastoplastic stress distributions in the model of the composite disc. The solution is performed using the ANSYS program. In order to evaluate the effects of uniform temperature, different temperature loadings are applied to the disc model uniformly. Both radial and tangential stresses are calculated under a uniform temperature loading which is chosen from between 80 to 120 C. Due to the composite disc having different thermal expansions in radial and tangential directions, thermal stresses were calculated by applying uniform temperature loading. The magnitude of tangential stress components for both elastic and elastoplastic solutions is higher than that of radial stress components. Moreover, residual stress components are obtained using the results of elastic and elastoplastic solutions. The calculated results point out that distributions and values of improved thermal stresses and residual stresses are considerably influenced with increasing uniform temperature loading.