MODELING OF THE COOL CREEPIN THE FRAMEWORK OF THE HARDENING THEORIES ON THE STEPWISE LOADING

In the framework of the hardening hypothesis, the creep behavior of a titanium alloy at room temperature is modeled at stepwise stress change both increasing and decreasing load. Methods for the identification of material constants and functions included in constitutive equations of the hardening theories are considered in detail. The prospects for the computational-experimental method proposed by Rybakina for determination of material constants in some versions of the hardening theory are noted. The results of the creep modeling of titanium alloy confirm the existing theoretical possibilities and limitations of the hardening hypothesis fully.