Non-linear analysis of composite structure subjected to impact load based on Johnson-Cook constitutive model

In this paper, the Johnson-Cook constitutive model and explicit algorithm are applied to the non-linear analysis of composite structures, and the aim of this paper is to provide a new method by which the response of elastic-plastic structure subjected to impact load can be obtained. The effect of strain and strain rate on structural stress is described in the Johnson-Cook constitutive model, and the calculation methods of important parameters in the Johnson-Cook constitutive model are provided. The mathematical expressions of implicit algorithm and explicit algorithm are derived, and the comparison between these two algorithms is conducted. The results show that the explicit algorithm is more suitable for the non-linear analysis of composite structures. A composite structure which consists of solid structures, shell structures and shock absorbers is used as numerical example to demonstrate the feasibility and effectiveness of the presented approach.