APPLICATION OF MPC-CONTROLLED COHESIVE ZONE MODELING FOR TEXTILE COMPOSITE FAILURE SIMULATION

Abstract

 In this paper, an MPC (multi-point constraint)-controlled selective activation method of cohesive elements is applied to simulate the progressive failure of textile composite material. First, cohesive elements are inserted between all bulk element sides in the region where failures may occur. The duplicated cohesive nodes are tied using MPCs prior to the start of the analysis, eliminating all additional degrees of freedom. As the analysis progresses, the MPCs are selectively released for nodes located in the region where failure is predicted to be imminent and, thus, the corresponding cohesive elements are activated. When applied to textile composite failure analyses, the present method demonstrated the accurate prediction of the stress-strain curves as well as the failure progression history while significantly reducing computer memory and computation time compared to those by the conventional cohesive zone modeling method.