A Structured Methodology to Simulate Composite Advanced Joint Behavior for Ultra-Light Platforms Applications

Numerical simulations have the potential to be used for designing damage-tolerance com posite structures. However, numerical models are currently computationally intensive, and their post-failure evolution and fracture morphology predictions are still limited. In the present work, a numerical methodology to simulate advanced composite joints is presented. The results of a numer ical campaign aimed to evaluate the progressive damage and failure analysis (PDFA) of an ad vanced pin-hole connection under tensile and compressive load are evaluated. A high-fidelity stacked shell-cohesive methodology is employed to simulate the ultimate load, fracture initiation, and propagation of the proposed composite joint. Post-failure erosion methodology is proposed to control the initiation and evolution of composite fractures. The location and extension of the numer ically predicted damages are compared with experimental observations. The proposed methodol ogy demonstrates its preliminary ability to be used for designing composite joints up to failure. Specific outcomes are also pointed out.