Journal
ENGINEERING FRACTURE MECHANICS
Volume 182, Issue -, Pages 521-536Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2017.03.051
Keywords
Triaxially woven fabric composite; Kagome; Fracture toughness; Waviness; Anisotropy
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Funding
- Malaysian Ministry of High Education (MOHE)
- Universiti Teknologi Malaysia [RJ130000.7809.4F518, Q.J130000.2422.03G65]
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Tows waviness and anisotropy effects on effective Mode I fracture toughness, K-IC, of triaxially woven fabric (TWF) composite were numerically and experimentally investigated. 2D isotropic Kagome, wavy isotropic, and wavy anisotropic TWF were modeled for various relative densities, crack lengths, and cell sizes, verification of which was ensured with experimental results. In general, Km increases with relative density, the inverse of cell size, and crack length. Both waviness and anisotropy cause a drop in K-IC, with a remarkable 76% of maximum knockdown in comparison to those without these effects. K-IC reduction is observed to be highly sensitive to tows waviness. The influence of tows anisotropy on K-IC reduction of TWF composites is somewhat minor, compared to TWF with wavy isotropic members. (C) 2017 Elsevier Ltd. All rights reserved.
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