A Dynamic Constitutive Equation Applicable for Impact Loading and Inverse Loading: Comparison with the Experimental Results for Aluminum

摘要

In this paper, a dynamic constitutive equation that is applicable for impact loading and inverse loading was investigated. The numerical calculation was done for aluminum using finite difference method under the boundary condition of measured axial and angular velocities. The calculated stress and strain agreed well with the experimental ones under torsional and inverse torsional loadings about the strain rate of 40 l/s. The comparison of calculated result with experimental one for the combined loadings of impact tension and torsion was also performed, and the validity of this constitutive equation was verified. Moreover, the appearing yield points were discussed based on some simulations under two-stage combined loadings of tension and torsion.