Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 73, Issue -, Pages 242-259Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2015.03.011
Keywords
Polymer-matrix composites (PMCs); 3-Dimensional reinforcement; Mechanical properties; Fracture
Funding
- Albany Engineered Composites
- Sakellaris Graduate Fellowship through the College of Engineering at the University of Maine
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This paper summarizes an extensive experimental study of composites reinforced with three-dimensional woven preforms subjected to tensile, compressive and in-plane shear loading. Three innovative three-dimensional woven architectures were examined that utilize large 12 K and 24 K IM7 carbon tows, including two ply to ply angle interlock architectures and one orthogonal architecture. Additionally, a two-dimensional quasi-isotropic woven material was evaluated for comparison. Loads were applied in both the warp and the weft directions for tensile and compressive loading. Digital image correlation was used to investigate full field strains leading up to quasi-static failure. Experimental results including ultimate strengths and moduli are analyzed alongside representative failure modes. The orthogonal woven material was found to have both greater strength and modulus in tension and compression, though a ply to ply woven architecture was found to outperform the remaining three-dimensional architectures. Recommendations are made for improving the manufacturing processes of certain three-dimensional woven architectures. (C) 2015 Elsevier Ltd. All rights reserved.
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