High strain rate tensile testing - Identification of dynamic constitutive flow law using high speed tensile test and Taylor gas gun

摘要

Over the last past years, numerous studies have been concentrated on dynamic mechanical properties of materials. Constitutive laws, the relation between applied forces and deformations, have also received much attention. Under large deformations and high deformation rates such as forming or machining processes, non-linear constitutive laws plays a significant role in predicting the mechanical behavior of materials. They will become more complicated if more physics are taken into account. The implementation of non-linear constitutive laws in numerical simulation requires the identification of a large number of parameters. This paper presents an inverse identification procedure of the Johnson-Cook constitutive law parameters for 2017 aluminium alloy (AlCu4MgSi) based on a new tensile test specimen.