天津工业大学学报2024，Vol.43Issue(3)：9-15,22,8.DOI:10.3969/j.issn.1671-024x.2024.03.002
2.5D机织复合材料双剪连接力学行为与损伤机制
Tensile mechanical behavior and damage mechanism of 2.5D woven composite with double-shear connection
摘要
Abstract
In order to clarify the influence of assembly parameters on the connection performance of 2.5D woven composite materials,specimens with different width-to-diameter ratios(w/D)and edge-to-diameter ratios(e/D)were prepared.The mechanical behavior and failure modes of the materials under double-lap tensile loads were analyzed,and the internal damage of the specimens was visualized using Micro-CT technology to elucidate the damage mechanism.The results showed that the composites could obtain higher mechanical properties when the hole was made with w/D of 6 and e/D of 3.However,reducing w/D or e/D appropriately could still maintain comparable strength.When w/D decreased to 4,the material decreased of 3.18％in stiffness and 2.77％in ultimate compressive strength.And the material decreased of 1.62％in stiffness and 7.19％in strength when e/D decreased to 2.5.The location parameters of the bolt hole would affect the failure mode of the material.Reducing w/D made the warp yarn bear more load and the failure mode evolved towards net-tension failure,while reducing e/D made the weft yarn bear more load and the failure mode evolved towards tearing failure.关键词
2.5D机织复合材料/螺栓连接/微计算机断层扫描技术(Micro-CT)/复合材料失效/损伤机制Key words
2.5D woven composites/bolted connection/Micro-CT/composite failure/damage mechanism分类
轻工纺织引用本文复制引用
钱坤,江昊,张典堂..2.5D机织复合材料双剪连接力学行为与损伤机制[J].天津工业大学学报,2024,43(3):9-15,22,8.基金项目
国家自然科学基金资助项目(12072131) （12072131）
江苏省优秀青年基金资助项目(BK20211583) （BK20211583）
