3D Nonlinear XFEM Simulation of Delamination in Unidirectional Composite Laminates: A Sensitivity Analysis of Modeling Parameters

Autor:	Abbas S. Milani, Damoon Motamedi
Rok vydání:	2013
Předmět:	Materials science Computer simulation business.industry Delamination Stiffness Structural engineering Composite laminates Finite element method Cohesive zone model Fracture (geology) medicine Composite material medicine.symptom business Extended finite element method
Zdroj:	Open Journal of Composite Materials. :113-126
ISSN:	2164-5655 2164-5612
DOI:	10.4236/ojcm.2013.34012
Popis:	This article presents a three-dimensional extended finite element (XFEM) approach for numerical simulation of delamination in unidirectional composites under fracture mode I. A cohesive zone model in front of the crack tip is used to include interface material nonlinearities. To avoid instability during simulations, a critical cohesive zone length is defined such that user-defined XFEM elements are only activated along the crack tip inside this zone. To demonstrate the accuracy of the new approach, XFEM results are compared to a set of benchmark experimental data from the literature as well as conventional FEM, mesh free, and interface element approaches. To evaluate the effect of modeling parameters, a set of sensitivity analyses have also been performed on the penalty stiffness factor, critical cohesive zone length, and mesh size. It has been discussed how the same model can be used for other fracture modes when both opening and contact mechanisms are active.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5c6c62de81375ac3e88cea17f074d1f2 https://doi.org/10.4236/ojcm.2013.34012 Zobrazit plný text záznamu