Steady-state creep analysis of thick-walled orthotropic cylinders

Abstract

By the use of a piecewise linear model, solutions are obtained for the steady-state creep of a thick-walled orthotropic cylinder subjected to internal pressure. Expressions for stresses and creep rates are derived for the three axial conditions of plane strain, closed end and open end. The results indicate that creep anisotropy has a significant effect on the cylinder behavior particularly in terms of creep rates which may differ by an order of magnitude compared to an isotropic analysis. Examination of available experimental data shows that the solution presented herein can help predict creep rate measurements more accurately.