期刊
COMPOSITE STRUCTURES
卷 133, 期 -, 页码 157-165出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2015.07.094
关键词
Delamination; Multiscale modeling; Finite element analysis (FEA); Fabrics/textiles
资金
- Consortium for Research and Innovation in Aerospace in Quebec (CRIAQ) Project [1.15]
Mode I delamination of a five harness satin weave carbon fibre composite and the corresponding toughening mechanisms are studied using a multiscale finite element model of delamination growth in a double cantilever beam (DCB) specimen. The toughening mechanisms related to the fabric structure are studied by embedding a meso-scale model of the fibre architecture in the delamination zone into a macro-scale model of a DCB specimen. The R-curves and the load displacement curves obtained from this analysis agree with the lower bound of the experimental results. The analysis identified two major toughening mechanisms: the inter-yarn locking ahead of the delamination front causing stress relaxation and the formation of sub-surfaces. Contribution of each toughening mechanism towards total delamination toughness is quantitatively evaluated, identifying the inter-yarn locking as the main source of toughening in mode I delamination of fabric composites. Video abstract: Multimedia 1 shows the different stages of the mode I delamination growth in a 5HS composite DCB specimen and its corresponding load displacement curve. (C) 2015 Elsevier Ltd. All rights reserved.
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