High-fidelity Progressive Damage Predictions of Composite T-joints Using Advanced Continuum Damage Model and Discrete Damage Model

摘要

High-fidelity progressive failure analyses of composite T-joint subject to pull-off tensile load are performed using the Composite Bonded and Bolted Toolkit for ABAQUS (CB~2ATA) and the Discrete Damage Modeling (DDM). The CB~2ATA model employs an advanced continuum damage model incorporating a set of physics-based LaRC05 damage criteria to predict the matrix and fiber damage progression in the T-joint specimen and a mixed-mode cohesive element method for interface delamination prediction. DDM utilizes the Regularized Extended Finite Element Method (Rx-FEM) and cohesive zone modeling to solve the complex damage processes and delamination in laminated composites. The predictive capabilities of CB~2ATA and DDM are demonstrated using the composite T-joint test data published in the literature. The failure load predictions, damage mechanisms, and sequences in the T-joint are accurately captured.