碳纤维增强编织复合材料圆管的扭转力学性能及其损伤机制

doi:10.13475/j.fzxb.20210303508

纺织学报 ›› 2022, Vol. 43 ›› Issue (03): 95-102.doi: 10.13475/j.fzxb.20210303508

碳纤维增强编织复合材料圆管的扭转力学性能及其损伤机制

谷元慧¹, 周红涛¹, 张典堂², 刘景艳²(), 王曙东¹

1.盐城工业职业技术学院, 江苏盐城 224005
2.生态纺织教育部重点实验室(江南大学), 江苏无锡 214122

收稿日期:2021-03-09 修回日期:2021-08-07 出版日期:2022-03-15 发布日期:2022-03-29
通讯作者: 刘景艳
作者简介:谷元慧(1993—),女,助教,硕士。主要研究方向为纺织结构复合材料。
基金资助:
江苏省自然科学基金面上项目(BK20201216);江苏高校青蓝工程项目(苏教师〔2018〕12号);江苏高校青蓝工程项目(苏教师〔2019〕3号);盐城工业职业技术学院校级课题资助项目(ygy2005)

Torsional mechanical properties and failure mechanism of braided carbon fiber reinforced composite tubes

GU Yuanhui¹, ZHOU Hongtao¹, ZHANG Diantang², LIU Jingyan²(), WANG Shudong¹

1. Yancheng Polytechnic College, Yancheng, Jiangsu 224005, China
2. Key Laboratory of Eco-Textiles(Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China

Received:2021-03-09 Revised:2021-08-07 Published:2022-03-15 Online:2022-03-29
Contact: LIU Jingyan

摘要/Abstract

摘要：

为研究编织层数对编织复合材料圆管的扭转力学性能和失效模式的影响,采用二维编织铺层(Over-Braiding)工艺及真空辅助树脂灌注成型工艺分别制备了2、3和4层的碳纤维/树脂编织复合材料圆管。通过搭建扭转试验-非接触全场应变测试平台,研究了3种编织层数的复合材料圆管的扭转力学响应。基于扫描电子显微镜与微计算机断层扫描技术等测试方法,分析了编织复合材料圆管的扭转失效机制。结果表明:编织复合材料圆管在扭转载荷下呈线弹性脆断特征,且形成了贯穿管壁的空间螺旋剪切带损伤区;编织层数的增加利于应力应变的稳定扩散,减少整体结构分层损伤,4层圆管的失效扭矩可达450.00 N·m,分别是3层圆管和2层圆管的1.39和2.20倍;失效模式主要有纤维断裂或劈裂、脱黏、基体开裂或碎裂等,宏观层面的失效模式种类差异不大,但在微观层面,编织层数越少,圆管的纤维失效特征更明显。

关键词: 碳纤维增强复合材料, 编织复合材料, 圆管, 扭转性能, 编织层数, 力学性能, 失效机制

Abstract:

In order to investigate the effect of layers on the torsional mechanical properties and failure modes of braided composite tubes, the over-braiding process and the vacuum-assisted resin infusion molding process were adopted in preparing 3 types of carbon fiber/resin braided composite tubes with 2, 3 and 4 layers. By setting up a non-contact full-field torsion strain test platform, the torsional mechanical responses of the braided composite tubes with different layers were studied. Using the scanning electron microscopy and microcomputer tomography technologies, the torsion failure mechanism of the braided composite tubes was analyzed. The results show that the braided composite tubes exhibit elastic and brittle fracture characteristics under torsional load, and spatial spiral shear band damage zones through the tube wall are formed. The increase in the number of braided layers promotes the stable spread of stress and strain, and reduces delamination damage of the overall structure. The failure torque of the composite tube with 4 braided layers reaches 450.00 N·m, which is 1.39 times and 2.20 times that of tubes with 3 and 2 braided layers, respectively. The failure modes mainly include fiber fracture or splitting, debonding, matrix cracking or chipping. There is little difference in the types of failure modes at the macro scale. But at the micro scale, the less the number of braided layers is associated to, the more obvious the fiber failure in the tubes.

Key words: carbon fiber reinforced composite, braided composite, tube, torsion property, braided layers, mechanical behavior, failure mechanism

中图分类号:

TB332

谷元慧, 周红涛, 张典堂, 刘景艳, 王曙东. 碳纤维增强编织复合材料圆管的扭转力学性能及其损伤机制[J]. 纺织学报, 2022, 43(03): 95-102.

GU Yuanhui, ZHOU Hongtao, ZHANG Diantang, LIU Jingyan, WANG Shudong. Torsional mechanical properties and failure mechanism of braided carbon fiber reinforced composite tubes[J]. Journal of Textile Research, 2022, 43(03): 95-102.

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编织层数	内径d/mm	壁厚t/mm	纤维体积分数V_f/%
2	24.77	1.18	47.98
3	24.86	1.84	46.65
4	24.64	2.04	46.33

碳纤维增强编织复合材料圆管的扭转力学性能及其损伤机制

Torsional mechanical properties and failure mechanism of braided carbon fiber reinforced composite tubes

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