Validity of one-dimensional experimental principle for flat specimen in bar–bar tensile impact apparatus

Abstract The Bar–bar Tensile Impact Apparatus (BTIA) is widely used to measure the dynamic tensile properties of solid materials. In the present paper, a simplified three-dimensional finite element model for the BTIA system with a flat specimen is established to simulate the experimental process of a BTIA. The numerical solution for the model is solved by ADINA. In the scope of elastoplastic theory, the numerical analysis confirms the validity of the one-dimensional experimental principle used in the BTIA, as long as certain foundations are satisfied.