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Affiliation of Author(s):航空学院

Journal:Compos. Struct.

Abstract:This paper presents the development and validation of a mesoscale numerical model for predicting the bearing damage and failure of composite laminates reinforced by unidirectional fibers. Firstly, half-hole pin bearing tests were carried out on composite laminates with both quasi-isotropic and soft lay-ups, as well as in specimens with variations in ply thickness and stacking sequence, using multiple measurement and inspection tools for a comprehensive characterization of the damage mechanisms. Then, three dimensional (3D) finite element models with a fiber-aligned mesh for composite plies and considering various frictional contacts were built to simulate the bearing tests using a commercial explicit solver. The embedded material model incorporated 3D phenomenological invariant-based failure criteria using in situ ply strengths, together with mechanism-based continuum damage models (longitudinal bi-linear damage model and transverse 3D smeared crack model) for intralaminar damage, and the cohesive zone model for interlaminar damage. Finally, detailed analyses and comparisons of the experimental and numerical results were performed in both macroscopic mechanical behavior and mesoscale failure mechanisms, where a good correlation was observed. Sensitivity studies on the effect of the modelling parameters on the post-peak response prediction were also conducted, providing relevant guidelines to identify future research directions. © 2019 Elsevier Ltd

ISSN No.:0263-8223

Translation or Not:no

Date of Publication:2019-01-01

Co-author:Zhuang, Fujian,Arteiro, Albertino,Camanho, Pedro P.

Correspondence Author:cph