Abstract
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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have