三维机织双层间隔复合材料的压缩性能

陈龙; 张昆; 郑连刚; 许福军

doi:10.13801/j.cnki.fhclxb.20210913.004

三维机织双层间隔复合材料的压缩性能

doi: 10.13801/j.cnki.fhclxb.20210913.004

东华大学　纺织学院，上海 201620

基金项目: 上海市自然科学基金(20ZR1402200)；中央高校基本科研业务费专项资金(2232021G-01)

详细信息

通讯作者:
许福军，博士，教授，博士生导师，研究方向为纺织结构复合材料　 E-mail: fjxu@dhu.edu.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2021-07-23
- 修回日期: 2021-08-22
- 录用日期: 2021-09-03
- 网络出版日期: 2021-09-14
- 刊出日期: 2022-08-31

Compression properties of three-dimensional woven double spacer composites

College of Textiles, Donghua University, Shanghai 201620, China

摘要

摘要: 为了增强三维机织间隔复合材料的压缩强度及提高其压缩能量吸收能力，受多层夹芯结构的设计理念启发，本论文设计并制备了柱纱高度为(6+6) mm及(4+8) mm的三维机织双层间隔复合材料。通过与柱纱高度为12 mm的单层间隔复合材料进行对比，研究了复合材料的平压、侧压性能及其破坏模式。结果表明，两种双层间隔复合材料的平压强度、侧压强度及能量吸收值相较于单层间隔复合材料都显著提高，其中柱纱高度为(6+6) mm的双层间隔复合材料的平压强度 (11.5 MPa) 提高了57.5%，平压比吸能值 (6983.7 J/kg) 提高了152.4%；此外，双层间隔复合材料的平压破坏模式为柱纱的逐层断裂，侧压破坏模式为面板裂纹扩展，表现出更大的吸能特性。双层间隔结构设计不仅显著增强了间隔复合材料的平压和侧压性能，而且改善了其破坏模式，提高了其在实际应用中的安全性，并为较高柱纱高度以及多层间隔复合材料的结构设计提供了新的思路。
- 三维机织间隔复合材料 /
- 双层间隔结构 /
- 压缩性能 /
- 吸能结构 /
- 破坏模式
Abstract: In order to enhance the compression strength of three-dimensional woven spacer composites and improve its compression energy absorption, inspired by the design concept of multi-layer sandwich structure, three-dimensional woven double spacer composites with pile height of (6+6) mm and (4+8) mm were designed and fabricated. The flatwise compression and edgewise compression properties and failure modes of the double spacer composites were investigated by comparing with the single spacer composites with the pile height of 12 mm. The results show that the flatwise compressive strength, edgewise compression strength and energy absorption of the two double spacer composites are improved significantly compared with that of single spacer composites. Among them, the flatwise compression strength (11.5 MPa) and specific energy absorption value (6983.7 J/kg) of the double spacer composites with pile height of (6+6) mm are increased by 57.5% and 152.4%, respectively. In addition, the flatwise compression failure mode of the double spacer composites is the fractures of the pile yarns layer by layer, and the edgewise compression failure mode is crack propagation of panel, which show greater energy absorption characteristic. The design of double spacer structure not only enhances the flatwise compression and edgewise compression properties of three-dimensional woven spacer composites, but also optimizes its failure modes, which improves the safety of spacer composites in practical application, and provides a new idea for the structural design of spacer composites with higher pile height or multilayer.
- 3D woven spacer composites /
- double spacer structure /
- compression property /
- energy absorbing structure /
- failure mode

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图 1 三维机织单/双层间隔织物的结构示意图

Figure 1. Structural diagrams of 3D woven single/double spacer fabrics

3DWSF—Three-dimensional woven spacer fabrics

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图 2 三维机织双层间隔织物的织造

Figure 2. Weaving of 3D woven double spacer composites

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图 3 三维机织单/双层间隔复合材料

Figure 3. 3D woven single/double spacer composites

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图 4 三维机织单/双层间隔复合材料的平压应力-应变曲线

Figure 4. Flatwise compression stress-strain curves of 3D woven single/double spacer composites

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图 5 三维机织单/双层间隔复合材料的平压峰值应力

Figure 5. Flatwise compression peak stress of 3D woven single/double spacer composites

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图 6 三维机织单/双层间隔复合材料的平压比吸能值

Figure 6. Specific energy absorption values of flatwise compression of 3D woven single/double spacer composites

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图 7 三维机织单/双层间隔复合材料的平压破坏过程

Figure 7. Flatwise compression failure process of 3D woven single/double spacer composites

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图 8 三维机织单/双层间隔复合材料的侧压应力-应变曲线

Figure 8. Edgewise compression stress-strain curves of 3D woven single/double spacer composites

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图 9 三维机织单/双层间隔复合材料的侧压峰值应力

Figure 9. Edgewise compression peak stress of 3D woven single/double spacer composites

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图 10 三维机织单/双层间隔复合材料的侧压比吸能值

Figure 10. Specific energy absorption values of edgewise compression of 3D woven single/double spacer composites

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图 11 三维机织单/双层间隔复合材料经纬向侧压破坏图

Figure 11. Edgewise compression failure pictures of 3D woven single/double spacer composites

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表 1 三维机织单/双层间隔织物的具体织造参数

Table 1. Specific weaving parameters of 3D woven single/double spacer fabrics

Specimen	Yarn linear density/(10⁻⁶ kg·m⁻¹)			Fabric density/(ends·cm⁻¹)			Pile height/mm
Specimen	Warp	Weft	Pile	Warp	Weft	Pile	Pile height/mm
3DWSF-12	300	600	300	5.1	5.5	5.1	12
3DWSF-6+6				5.1	5.3	5.1	6+6
3DWSF-4+8				5.1	5.3	5.1	4+8

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表 2 三维机织单/双层间隔复合材料试样的参数信息

Table 2. Details of parameters of 3D woven single/double spacer composites

Specimen	Compression direction	L/mm	W/mm	H/mm	Density/(g·cm⁻³)	Fiber mass fraction/wt%
3DWSC-12	Flat	29.89	29.98	12.13	0.38	47.27
	Warp	99.55	52.07
	Weft	100.62	52.04
3DWSC-6+6	Flat	30.19	30.43	11.78	0.55	44.47
	Warp	99.85	51.96
	Weft	100.15	52.19
3DWSC-4+8	Flat	29.86	30.02	12.23	0.52	42.42
	Warp	100.20	51.47
	Weft	100.30	51.59
Notes: L—Length of the specimen; W—Width of the specimen; H—Thickness of the specimen.

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