Connection performance and failure mechanisms of three-dimensional woven composites

doi:10.19936/j.cnki.2096-8000.20240928.001

Abstract

Abstract: In order to study the influence of fabric structures on the connection performance of three-dimensional woven composites, multi-layer multi-directional woven structure and layer-to-layer interlock woven structure composites were designed, and a macro-meso coupling analysis model of the open-hole connection structures was established to reveal the failure mechanism of 3D woven composite connections. The study shows that the proportion of ±45° yarn has an important effect on the extrusion strength of the mechanical connection of the composite material, and the introduction of ±45° yarns can improve the content of load-bearing yarns, which can effectively improve the stress concentration at the hole edge; the multi-layer multi-directional woven composites are mainly subjected to transverse and longitudinal damages of 0° yarn, 90° yarn, and bias yarns; these damages start at the hole edge and progressively spread symmetrically. The transmission direction of load and the propagation direction of damage show angular characteristics.

Key words: 3D woven composites, pinned joints, macro-meso combined model, mechanical behavior, failure
mechanism

CLC Number:

TB332

ZHANG Qian, ZHANG Yifan, ZOU Qi, ZHANG Peng, JIAO Yanan, AN Liuxu, LIU Yanfeng, ZHANG Daijun, HAO Junjie, CHEN Li. Connection performance and failure mechanisms of three-dimensional woven composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(9): 5-11.

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