Simulation parameter matrix capture and validation of a composite continuous damage model in LS‐DYNA

Abstract In this study, the acquisition and validation of the high‐performance carbon fiber‐reinforced polymer (CFRP) composite continuous damage model MAT_261 parameter matrix in LS‐DYNA were investigated to achieve the accuracy of finite element modeling. Through experiments and single element tests, the key parameters were systematically sorted out and captured. Then, the shell element model of composite laminate was established and the parameter matrix was further verified by the drop‐weight impact test. The results show that the fracture toughness of longitudinal tension/compression and transverse tension/compression are 453.89, 114.44, 0.53, and 7.52 kJ/m², respectively. Under the impact energy of 100, 150, 200 J, the load–displacement curves obtained by using MAT_261 are in good agreement with the actual test results. The peak load error is 2.80%, 1.38% and 1.12%, respectively. As a result, the verified MAT_261 simulation parameter matrix can accurately predict the damage failure behavior of CFRP laminates under dynamic impact. Highlights LS‐DYNA material model MAT_261 parameter matrix was accurately captured. The testing and validation process of important parameters was established. Intralaminar fracture toughness were obtained by double‐edge notched tests. The peak load errors of the impact simulation results were less than 3%. The prediction of impact results of CFRP laminates is reliable and efficient.