A hypoelastic-viscoplastic constitutive model in LS-DYNA for dynamic strain aging – the McCormick model

A constitutive model for dynamic strain aging proposed by McCormick (1988) is imple-mented in LS-DYNA within the framework of hypoelastic-viscoplasticity. A procedure for parameter identification is outlined, and the material constants for the aluminium alloy AA5083-H116 are determined. Finite element simulations of tension tests with smooth and notched AA5083-H116 specimens are conducted using the implicit and explicit solvers of LS-DYNA, and the results are compared with existing experimental results.