Numerical analysis of the influence of the damping rings’ dimensions on interrupted dynamic tension experiment results

Abstract

This article discusses the influence of the dimensions of the damping rings used for interrupting a dynamic tension experiment on the results of a modified split Hopkinson tension bar. The damping rings enclosed in an external fixture which modifies the classical split Hopkinson tension bar play a significant role in buffering the dynamic tension experiments before the specimen reaches its failure strength. Finite element simulations of high-strain-rate tension experiments are accomplished on Aluminium 7017-T73 alloy specimens when varying the thickness or the cross-sectional area of the damping rings. Finite element analyses described herein are applied to simulate the effects of the variation of the damping rings’ dimensions to provide a reference for improvement of a modified split Hopkinson tension bar experimental apparatus and guidance for future studies in which optimum dimensions for the damping rings can be studied. In view of this research, it can be concluded that the thickness of the damping rings is a factor that can resolutely influence the interrupted dynamic tension experiment results, while their cross-sectional area can be excluded as a factor influencing the results of the modified split Hopkinson tension bar experiments.