三维四向和五向编织复合材料冲击断裂行为的多尺度模拟

doi:10.13475/j.fzxb.20190902007

纺织学报 ›› 2020, Vol. 41 ›› Issue (10): 67-73.doi: 10.13475/j.fzxb.20190902007

三维四向和五向编织复合材料冲击断裂行为的多尺度模拟

封端佩¹^,², 商元元³, 李俊¹^,²()

1.东华大学服装与艺术设计学院, 上海 200051
2.现代服装设计与技术教育部重点实验室(东华大学),上海 200051
3.青岛科技大学高分子科学与工程学院, 山东青岛 266042

收稿日期:2019-09-05 修回日期:2020-07-07 出版日期:2020-10-15 发布日期:2020-10-27
通讯作者: 李俊
作者简介:封端佩(1996—),女,硕士生。主要研究方向为服装舒适性及产品开发。

Multi-scale simulation of impact failure behavior for 4- and 5-directional 3-D braided composites

FENG Duanpei¹^,², SHANG Yuanyuan³, LI Jun¹^,²()

1. College of Fashion and Design, Donghua University, Shanghai 200051, China
2. Key Laboratory of Clothing Design and Technology (Donghua University), Ministry of Education, Shanghai 200051, China
3. College of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao, Shandong 266042, China

Received:2019-09-05 Revised:2020-07-07 Online:2020-10-15 Published:2020-10-27
Contact: LI Jun

摘要/Abstract

摘要：

为对三维编织复合材料的结构特性进行模拟预测分析,采用一种多尺度和细观结构结合的方法,建立三维编织复合材料的等效拼接组合模型,进一步揭示编织复合材料在微观结构水平下的冲击损伤演化、裂纹扩展和能量吸收。设计制备三维四向和三维五向2种编织结构的碳/环氧树脂三维编织复合材料,根据编织参数建立等效拼接组合模型;通过落锤式冲击试验仪结合高速摄影系统记录2种编织复合材料在低速冲击下的断裂行为,与等效拼接组合模型在有限元数值模拟结果相对比,验证等效拼接组合模型的有效性。模拟结果表明,相同的体积分数下轴纱表现出最高的能量吸收,由于轴纱的存在,三维五向编织复合材料的抗裂性和裂纹扩展性优于三维四向编织复合材料。

关键词: 三维编织复合材料, 模型构建, 冲击断裂行为, 比能量吸收, 有限元分析

Abstract:

In order to simulate and predict the complex mechanical characteristics of 3-D braided composites against impact, a multi-scale meso-structure method was used to establish an equivalent combination model of 3-D braided composites to study impact behavior of braided composites. Impact damage evolution, crack propagation and energy absorption were examined numerically. 4- and 5-directional 3-D braided structures were used to prepare braided composites, and the equivalent combination model was established according to the obtained braid parameters. A drop weight impact tester equipped with a high-speed camera was used to record the fracture behavior of the 4-directional 3-D and 5-directional 3-D braided composites under low-speed impact. The 3-D braided composite equivalent combination models were validated by the fracture behavior obtained from the experiments. The simulation results show that under the same volume fraction, the axial yarn exhibits the highest energy absorption. Due to the presence of axial yarns, the 5-directional 3-D braided composites have better crack resistance and crack propagation than the 4-directional 3-D braided composites.

Key words: 3-D braided composite, model construction, impact fracture behavior, specific energy absorption, finite element analysis

中图分类号:

TB332

封端佩, 商元元, 李俊. 三维四向和五向编织复合材料冲击断裂行为的多尺度模拟[J]. 纺织学报, 2020, 41(10): 67-73.

FENG Duanpei, SHANG Yuanyuan, LI Jun. Multi-scale simulation of impact failure behavior for 4- and 5-directional 3-D braided composites[J]. Journal of Textile Research, 2020, 41(10): 67-73.

图/表 11

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纤维类型	结构	编织角 φ/(°)	纤维体积分数V_f/%	试样尺寸 (L×W×H)/mm
T700-12K	三维四向	25.97	36.77	70×14×7
T700-12K	三维五向	23.84	32.19	70×14×7

结构	类型	E_z/ GPa	E_y/ GPa	E_x/ GPa	ν_xx	ν_y	ν_z	G_xz/ GPa	G_yz/ GPa	G_xy/ GPa
三维四向	内单胞	24.86	4.73	4.73	0.36	0.36	0.43	8.38	8.38	5.80
	面单胞	11.94	3.90	3.94	0.44	0.37	0.39	1.74	1.94	1.32
	内单胞	34.18	4.51	4.51	0.33	0.33	0.40	6.53	6.53	3.82
三维五向	面单胞	11.60	3.58	3.67	0.43	0.36	0.38	1.76	1.66	1.25

三维四向和五向编织复合材料冲击断裂行为的多尺度模拟

Multi-scale simulation of impact failure behavior for 4- and 5-directional 3-D braided composites

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