工字形三维机织复合材料的弯曲性能

doi:10.13475/j.fzxb.20180501006

摘要/Abstract

摘要：

为解决当前常用的工字形铺层复合材料在弯曲受力过程中发生分层的现象,通过对常规机织工艺进行合理设计,利用普通织机织造3种不同高度的工字形三维机织物,采用真空辅助树脂传递模塑成型技术将工字形三维机织物加工成3种不同高度的工字形三维机织复合材料并研究其受力特征;通过弯曲实验和ABAQUS有限元模拟分别对比分析不同高度的工字形三维机织复合材料在相同加载速度下的载荷/能量与位移间的关系及材料的弯曲破坏模式。研究结果显示,实验数据与有限元模型具有较好的一致性,表明该有限元模型具有较高的可靠性,可用于预测不同高度的工字形三维机织复合材料的力学性质,可为高冲击损伤容限的工字形三维机织复合材料优化设计提供理论指导。

关键词: 复合材料, 工字形, 三维机织结构, 真空辅助树脂传递模塑, 有限元模拟

Abstract:

In order to solve the delamination of I-shaped laminated composites under bending loads, three I-shaped three-dimensional (3-D) woven fabrics with different heights were prepared by rational design of conventional weaving process on the common loom, then I-shaped 3-D woven fabrics with three different heights were fabricated into I-shaped 3-D woven composites by vacuum assisted resin transfer moulding technology to study the mechanical characteristics of the composites. Bending experiment and ABAQUS finite element simulation were used to compare and analyze the relationship between load/energy and displacement and the bending failure mode of I-shaped 3-D woven composites with three different heights under the same loading speed, respectively. The results show that the experimental data are in good agreement with the finite element model, showing that the finite element model has high reliability and can be used to predict the mechanical properties of I-shaped 3-D woven composites with different heights, which can provide theoretical guidance for the optimization design of I-shaped 3-D woven composites with high impact damage tolerance.

Key words: composity, I-shaped, three-dimensional woven structure, vacuum assisted resin transfer molding, finite element analysis

中图分类号:

TS101.2

黄耀丽, 吕丽华, 王观桔. 工字形三维机织复合材料的弯曲性能[J]. 纺织学报, 2019, 40(04): 66-71.

HUANG Yaoli, LÜ Lihua, WANG Guanju. Bending properties of three-dimensional I-shaped woven composites[J]. Journal of Textile Research, 2019, 40(04): 66-71.

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高度/mm	纱线层数		纱线密度/tex
高度/mm	A₁/A₃	A₂	经纱	纬纱
20	5	11	800	800
40	5	11	800	800
60	5	11	800	800

高度/mm	E₁₁/GPa	E₂₂/GPa	E₃₃/GPa	V₁₂	V₂₃	V₁₃	G₁₂/GPa	G₁₃/GPa	G₂₃/GPa
20	76.12	5.82	5.82	0.25	0.25	0.21	2.32	2.32	1.55
40	125.90	7.29	7.29	0.25	0.25	0.21	4.31	4.31	3.65
60	160.70	10.57	10.57	0.30	0.30	0.21	7.38	7.38	5.75

高度/mm	实验值/kN	模拟值/kN	误差/%
20	9.89	10.60	6.7
40	8.36	8.56	2.3
60	6.12	6.42	4.7

高度/mm	实验值/MPa	模拟值/MPa	误差/%
20	824.86	883.33	6.7
40	696.67	713.33	2.3
60	510.07	535.00	4.7