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Adaptive implicit-explicit method for robust and efficient failure analysis of composite materials
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DOI：10.1016/j.compositesa.2024.108093.png)
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Abstract
En 中文
Despite numerous methods devised for the analysis of composite materials, substantial challenges persist in modeling the progressive failure process. Specifically, the damage -induced strain softening may cause convergence difficulty in implicit procedures, whereas lack of accuracy and restriction on time -step length are problems of concern for explicit formulations. Herein, we develop an adaptive implicit-explicit method (A-IEM) to enhance the robustness and efficiency of computational failure models. Initially, implicit algorithms are applied for non-linear analysis, during which critical nodes that hinder the convergence rate are identified through a concurrent monitoring algorithm. Upon fatal non -convergence, explicit constitutive law is locally enforced on the corresponding material points to evaluate the damage progression within current increment, and reversion to implicit scheme is subsequently enabled by A-IEM after resolving the numerical issues. The performance of A-IEM against conventional methods is verified via standard numerical examples and further demonstrated in the failure modeling of composite laminates.
Keywords:
Laminates
Fracture
Computational modeling
Finite element analysis (FEA)
Journal
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