ねじり応力波伝ぱの有限要素解析

抄録

Finite element analysis of the experimental data of YEW and RICHARDSON on torsional plastic waves in a tube of copper is presented. Three different constitutive equations are used to describe the strain data in torsional impact.
The strain-rate dependent solutions show better agreement with the experiment than the strainrate independent solution, but experimental observations that the plastic shear strains along the tube decrease with increasing distance from the impact end are not well predicted by any one of the rate-dependent, or rate-independent theories considered. The discrepancies between experimental and computed results are due to the inaccuracy of constitutive equations employed in the present study. It appears therefore that the more realistic constitutive equation must include not only strain-rate effect but also some factors such as strain-rate history and temperature effects.