Combined Dynamic Behavior in a Thin-Walled Tube : Study on Strain Rate Dependency

Abstract

Numerical analysis is carried out based on characteristics under initial and boundary conditions of static pre tension and impulsive torsion. A constitutive equation of the Perzyna type is used and isotropic work-hardening is taken into account. Consequently, unloading behavior of the axial component is produced. Stress and strain distributions are changed considerably with the value of the material constant. The results of the calculation are also compared with that of the strain rate-independent theory. Both theories are compared with the experimental results.