FEM simulation of a modified DCB test for 3-D orthogonal interlocked fabric composites

Citation
Y. Tanzawa et al., FEM simulation of a modified DCB test for 3-D orthogonal interlocked fabric composites, COMP SCI T, 61(8), 2001, pp. 1097-1107
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
COMPOSITES SCIENCE AND TECHNOLOGY
ISSN journal
0266-3538 → ACNP
Volume
61
Issue
8
Year of publication
2001
Pages
1097 - 1107
Database
ISI
SICI code
0266-3538(2001)61:8<1097:FSOAMD>2.0.ZU;2-Y
Abstract
A mechanical model for the delamination extension of 3-D orthogonal interlo cked fabric composites has been developed by using a 2-D finite-element met hod to simulate experimental results from modified DCB tests. The fracture phenomena around z-fiber bundles, such as debonding from the in-plane layer , slack absorption and fiber bridging, are introduced in the analysis. The experimental results could be simulated to a reasonable degree by the prese nt model. The slack length and z-fiber slip introduced into the model were determined by the parametric study, and their results indicate that the dif ference in slack length has a serious effect only in the early stage of cra ck extension, and that the friction becomes dominant after this phase as a result of the increased number of bridging fibers. It is proved numerically that the coupled mechanism of z-fiber slip, absorption of slack and the fi ber breakage provide the increase of the interlaminar fracture toughness of 3-D composites. (C) 2001 Elsevier Science Ltd. All rights reserved.