High-fidelity Progressive Failure Analysis of the Open Hole Tensile (OHT) Behavior of Composite Laminates with a Novel Semi-discrete Method

摘要

Using a novel semi-discrete method that is presented in [1, 2] and a mesh-enhanced de-lamination model [3], numerical analyses of open hole tensile (OHT) specimens have been performed. The novel method combines high predictive fidelity clue to discrete meshing features and high computational efficiency by using continuum damage and failure modeling using enhanced Schapery theory and the crack band method. The proposed model is capable of accurately predicting the failure progression and tensile strength of laminates with different layups ("hard", "quasi-isotropic", "soft") and scaled specimens with delamination-dominated failure mechanisms, where the interaction between intra-ply matrix cracks and delamination is accurately captured.