Adaptive multiscale modeling of fiber-reinforced composite materials subjected to transverse microcracking

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• 作者：Fabrizio Greco ; ^{f.greco@unical.it" class="auth_mail} ; Lorenzo Leonetti ^{lorenzo.leonetti@unical.it" class="auth_mail} ; Paolo Nevone Blasi ^{paolo.nevoneblasi@unical.it" class="auth_mail}
• 关键词：Polymer&ndash ; matrix composites (PMCs) ; Transverse cracking ; Finite element analysis (FEA) ; Micro-mechanics ; Multiscale methods
• 刊名：Composite Structures
• 出版年：July 2014
• 年：2014
• 卷：113
• 期：Complete
• 页码：249-263
• 全文大小：3147 K

文摘

In this work an innovative multiscale model able to perform complete failure analyses of fiber-reinforced composite materials subjected to transverse cracking is presented, taking advantage of an adaptive multilevel domain decomposition method in conjunction with a fracture criterion able to track the crack path. Competition between fiber/matrix interface debonding and kinking phenomena from and towards the matrix is accounted for, whereas continuous matrix cracking is modeled by using a novel shape optimization strategy. Numerical calculations are performed with reference to the complete failure analysis of a single-notched fiber-reinforced composite beam subjected to a three-point bending test. Comparisons with reference solutions obtained by means of a fully microscopic analysis are presented in order to validate the proposed multiscale approach.