针刺/缝合多尺度联锁复合材料I型层间力学行为

doi:10.13475/j.fzxb.20230702001

纺织学报 ›› 2024, Vol. 45 ›› Issue (08): 173-182.doi: 10.13475/j.fzxb.20230702001

针刺/缝合多尺度联锁复合材料I型层间力学行为

陈小明¹^,²^,³, 吴凯杰¹^,², 郑宏伟²^,³, 张敬义⁴, 苏星兆²^,³, 辛世纪²^,³, 郭东升¹^,², 陈利¹^,²()

1.天津工业大学纺织科学与工程学院, 天津 300387
2.天津工业大学先进纺织复合材料教育部重点实验室, 天津 300387
3.天津工业大学机械工程学院, 天津 300387
4.航天材料及工艺研究所, 北京 100080

收稿日期:2023-07-10 修回日期:2024-01-23 出版日期:2024-08-15 发布日期:2024-08-21
通讯作者: 陈利(1968—),男,教授,博士。主要研究方向为纺织复合材料。E-mail:chenli@tiangong.edu.cn。
作者简介:陈小明(1984—),男,高级实验师,博士。主要研究方向为纺织机器人装备及纺织复合材料。
基金资助:
天津市自然科学基金项目(19JCYBJC18300);先进功能复合材料技术重点实验室基金项目(6142906210406)

Mode I interlaminar mechanical behavior of needled/stitched multi-scale interlocking composites

CHEN Xiaoming¹^,²^,³, WU Kaijie¹^,², ZHENG Hongwei²^,³, ZHANG Jingyi⁴, SU Xingzhao²^,³, XIN Shiji²^,³, GUO Dongsheng¹^,², CHEN Li¹^,²()

1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
2. Key Laboratory of Advanced Textile Composite Materials of Ministry of Education, Tiangong University, Tianjin 300387, China
3. School of Mechanical Engineering, Tiangong University, Tianjin 300387, China
4. Aerospace Research Institute of Materials & Processing Technology, Beijing 100080, China

Received:2023-07-10 Revised:2024-01-23 Published:2024-08-15 Online:2024-08-21

摘要/Abstract

摘要：

为明晰缝合工艺对针刺结构复合材料 I 型层间力学性能的影响,以石英机织布和石英纱线为原料,设计制备了针刺/缝合多尺度联锁织物及复合材料,采用Micro-CT对多尺度联锁织物结构进行表征,进一步研究了多尺度联锁复合材料I型层间力学行为,同时建立了I型层间断裂行为有限元分析模型,阐明了多尺度联锁复合材料的层间强化机制。研究结果表明:相比针刺复合材料,多尺度联锁复合材料的层间载荷值最大提高46.61%,临界能量释放率最大提高55.55%;在缝合矩阵不变的情况下,单束缝合纱线从100 tex增大到200 tex,最大破坏载荷提高了12.91%,临界能量释放率提高了17.8%;随着缝合矩阵增大,总植入量从800 tex增大到1 600 tex后,最大破坏载荷提高了22.8%,临界能量释放率提高了47.3%;此外,多尺度联锁复合材料有限元模型的I型层间断裂模拟结果与实验结果相吻合,最大误差仅为3.1%,建立的有限元模型可较为准确地预测多尺度联锁复合材料Ⅰ型层间失效行为。

关键词: 针刺, 织物, 复合材料, 缝合, 层间强度

Abstract:

Objective Non-felt needled/stitched multi-scale interlocking composites is a new type of fabric structure which enhances interlamainar strength, and it is excepted to meet the working requirements in complex environments such as hypersonic vehicles. However, the effect of stitching process on the mechanical properties of modeⅠinterlaminar property of non-felt needled composites is still unclear. In order to explore the influence of different stitching processes on the interlaminar properties of multi-scale interlocking composites and predict the modeⅠfracture behavior, multi-scale interlocking fabrics and composites are prepared, and a finite element model of modeⅠfracture behavior of multi-scale interlocking composite is established.

Method In this research, quartz yarn and quartz fabrics are used as raw materials for the preparation of the multi-scale interlocking fabrics and composite. According to ASTM D5528 experimental standard, modeⅠfracture behavior was tested with the prepared samples. Micro-CT and scaming electron microswpe(SEM) were used to observe and analyze the fabric structure and fracture morphology of the samples. A finite element model of mode I fracture behavior of multi-scale interlocked composites is established by using the 3 cohesive model.

Results The results showed that the introduction of stitching yarns significantly improved the interlaminar property of needled composites. The maximum interlaminar fracture load of the needled composite reached 81.56 N. The interlaminar fracture load values of multi-scale interlocking composites with different stitching matrices and fiber volume contents were 97.31 N, 107.84 N, and 119.57 N, respectively. Compared with the needled composite, the interlaminar fracture strength was improved by 19.31%-46.61%. The critical energy release rate of needled composite was 1.80 J/m², and the critical energy release rates of multi-scale interlocking composites with different preparation processes were 1.96 J/m², 2.24 J/m² and 2.80 J/m², respectivey. Compared with the needled composite, this was improved by 8.9%-55.55%. With the same stitching matrix, when the implantation amount of a single stitching yarn was increased from 100 to 200 tex, the maximum interlaminar failure load was increased by 12.91% and the critical energy release rate was increased by 17.8%. The implantation amount of the single stitiching yarn remained unchanged. With the increase of the stitching matrix, the total implantation volume was increased from 800 tex to 1 600 tex, the maximum interlaminar failure load was increased by 22.9% and the critical energy release rate was increased by 47.3%. Micro-CT observation of multi-scale interlocking fabrics revealed that the introduction of stitched and needle punched fiber bundles squeezed the fibers in the substrate, and that stitching yarns through the thickness direction of the fabric worked to achieve effective interlaminar connection. The needled fiber bundle showed T-shape and the interlaminar connection was weaker than that of stitching yarn. The fracture morphology of multi-scale interlocking composite was analyzed. The failure behavior included matrix cracking, fiber pulling out and fiber fracture. The finite element model was used to simulate the mode I fracture behavior of multi-scale interlocking composite, and the simulation results were consistent with the sample results, with a maximum error of only 3.10%.

Conclusion The study showed that compared to the needled composite, the interlaminar fracture performance of multi-scale interlocking composite is significantly improved. The maximum interlayer fracture load was increased by 19.31%-46.61%, and the critical energy release rate was increased by 8.9%-55.55%. The implantation amount of single yarn and the stitching matrix are the main factors affecting the interlaminar performance of multi-scale interlocking composite. The larger the implantation amount of a single bundle of yarn and the larger the stitching matrix, the better the interlaminar performance. The failure modes of multi-scale interlocking composite include matrix cracking, fiber pull-out, and fiber fracture. The error between the finite element simulation results of multi-scale interlocking composite and the actual results is only 3.10%, indicating that the finite element model can accurately predict the mode I interlaminar fracture behavior of multi-scale interlocking composite.

Key words: needling, fabric, composite, stitching, interlaminar strength

中图分类号:

TB332

陈小明, 吴凯杰, 郑宏伟, 张敬义, 苏星兆, 辛世纪, 郭东升, 陈利. 针刺/缝合多尺度联锁复合材料I型层间力学行为[J]. 纺织学报, 2024, 45(08): 173-182.

CHEN Xiaoming, WU Kaijie, ZHENG Hongwei, ZHANG Jingyi, SU Xingzhao, XIN Shiji, GUO Dongsheng, CHEN Li. Mode I interlaminar mechanical behavior of needled/stitched multi-scale interlocking composites[J]. Journal of Textile Research, 2024, 45(08): 173-182.

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链接本文: http://www.fzxb.org.cn/CN/10.13475/j.fzxb.20230702001

http://www.fzxb.org.cn/CN/Y2024/V45/I08/173

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材料	结构	面密度/ (g·cm^-2)	厚度/ mm	拉伸强度/ (N·(25 mm)^-1)
石英基布	缎纹	460	0.45	2 719
石英半切布	斜纹	285	0.30	—

样品编号	制备方式	缝合纤维束的线密度	缝合间距/mm	缝合矩阵行列数	体积分数/%
1^#	针刺	—	—	—	45.4
2^#	针刺/缝合	100 tex×8	3	3×8	46.9
3^#	针刺/缝合	200 tex×4	6	3×4	46.9
4^#	针刺/缝合	400 tex×4	6	3×4	48.4

材料	E₁₁/ GPa	E₂₂/ GPa	E₃₃/ GPa	G₁₂/ GPa	G₁₃/ GPa	G₂₃/ GPa	v₁₂	v₁₃	v₂₃
树脂	3.45	3.45	3.45	1.28	1.28	1.28	0.35	0.35	0.35
针刺纤维	3.75	3.75	13.49	0.90	1.73	1.73	0.17	0.20	0.20
缝合纤维	4.90	4.90	46.41	2.43	2.39	2.39	0.21	0.21	0.21

样品编号	最大载荷/N		误差/%
样品编号	实验值	模拟值	误差/%
1^#	81.56	84.10	3.10
2^#	94.43	93.75	0.70
3^#	106.32	108.22	1.80
4^#	119.57	118.50	0.70

针刺/缝合多尺度联锁复合材料I型层间力学行为

Mode I interlaminar mechanical behavior of needled/stitched multi-scale interlocking composites

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