Modification of the Johnson–Cook model for metal at a wide range of strain rates and application in the dynamic response of honeycomb panels

Abstract

In this paper, the H/V-Johnson Cook (JC)/Cowper Symonds (CS) dynamic constitutive relation suitable for a wide range of strain rates is proposed. Based on the experimental data in the existing literatures, the parameters of the H/V-JC/CS constitutive model for metal materials are calibrated by using the global optimization algorithm, which has high accuracy, convenient application, and is unlimited in number of parameters. The obtained parameters do not depend on the initial value and are the global optimal combination. The corresponding ABAQUS visual user material subroutine is compiled and imported into the finite element analysis for the dynamic response of the honeycomb panel structure. The influence of geometric parameters on the energy absorption effect of honeycomb panels under impact load is explored. The research shows that the proposed H/V-JC/CS constitutive model can well describe the mechanical behavior of various metals in a wide range of strain rates under impact load, and can be used in ABAQUS dynamic explicit environment. It provides a high-precision engineering application analysis model for metal structures under dynamic load.