A sequential remeshing framework for quasi-static propagation of large and curved delaminations using the virtual crack closure technique

Delamination is a predominant failure mode in composite materials, needing advanced numerical techniques for accurate predictions. This paper presents a computational framework for simulating delamination growth under quasi-static loading conditions using the Virtual Crack Closure Technique (VCCT) in a sequential-simulation automated-remeshing approach to address the technique’s inherent mesh dependence. The delamination propagation length is determined by substituting Strain Energy Release Rate (SERR) truncated Taylor’s expansion series into the Griffith’s energy-based propagation criterion. The evolving delamination front is updated through an automated remeshing algorithm, enabling accurate tracking of the delamination front advancement and mitigating the mesh dependency observed in conventional VCCT implementations. The framework is demonstrated through multiple models featuring large and curved delamination fronts under various and varying mixed-mode loading conditions.