三维五向编织复合材料低速冲击及冲击后压缩性能实验研究

doi:10.11868/j.issn.1001-4381.2015.000861

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摘要

通过实验研究三维五向碳纤维/环氧树脂编织复合材料低速冲击及其冲击后压缩（CAI）性能。测试试件虽然有不同的编织角度，但承受相同的冲击能力。采用冲击后压缩测试表征不同编织结构的冲击后剩余力学性能。结果表明：编织角较大的试件由于其更紧密的空间结构，能承受更高的冲击载荷且冲击损伤区域更小。CAI强度和损伤机理主要取决于编织纤维束的轴向支撑。随着编织角的增加，CAI强度降低，材料的破坏模式也由横向断裂转变为剪切破坏。

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	严实
	郭留雨
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	陆夏美
	曾涛

关键词 ：三维五向, 编织复合材料, 低速冲击, 冲击后压缩, 损伤机理

Abstract：

The low-velocity impact and compression after impact (CAI) properties of three-dimensional (3D) five-directional carbon fiber/epoxy resin braided composites were experimentally investigated. Specimens prepared with different braiding angles were tested at the same impact energy level. Residual post-impact mechanical properties of the different configurations were characterized by compression after impact tests. Results show that the specimens with bigger braiding angle sustain higher peak loads, and smaller impact damage area, mainly attributes to a more compact space construction. The CAI strength and damage mechanism are found to be mainly dependent on the axial support of the braiding fiber tows. With the increase of braiding angle, the CAI strength decreases, and the damage mode of the composites is changed from transverse fracture to shear failure.

Key words： 3D five-directional braided composite low-velocity impact CAI damage mechanism

收稿日期: 2015-07-13 出版日期: 2017-12-19

中图分类号:

TB332

基金资助:国家自然科学基金项目(11102055);国家自然科学基金项目(11272110)

通讯作者: 严实 E-mail: yanshi@hrbust.edu.cn

作者简介: 严实(1977-), 男, 博士, 副教授, 从事复合材料性能表征研究, 联系地址:黑龙江省哈尔滨市学府路52号哈尔滨理工大学建筑工程学院421室(150080), E-mail:yanshi@hrbust.edu.cn

引用本文:

严实, 郭留雨, 赵金阳, 陆夏美, 曾涛. 三维五向编织复合材料低速冲击及冲击后压缩性能实验研究[J]. 材料工程, 2017, 45(12): 65-70.
Shi YAN, Liu-yu GUO, Jin-yang ZHAO, Xia-mei LU, Tao ZENG. Experimental Investigation on Low-velocity Impact and Compression After Impact Properties of Three-dimensional Five-directional Braided Composites. Journal of Materials Engineering, 2017, 45(12): 65-70.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.000861 或 http://jme.biam.ac.cn/CN/Y2017/V45/I12/65

Fig.1 Instron 9250HV型落锤试验机

Fig.2 三维五向编织复合材料冲击示意图

Table 1 材料编号及参数

Table 2 基体及碳纤维的性能

Table 3 三维编织复合材料试件冲击数据

Table 4 三维编织复合材料冲击参数的平均值与方差

Table 5 三维编织复合材料冲击后压缩数据

Fig.3 30J冲击时载荷和能量与时间曲线

Fig.4 30J冲击时载荷-位移曲线

Fig.5 试件冲击损伤照片 (a)15°试件正面；(b)15°试件背面；(c)25°试件正面；(d)25°试件背面；(e)35°试件正面；(f)35°试件背面

Fig.6 CAI测试装置

Fig.7 CAI载荷-位移曲线

Fig.8 三维编织复合材料CAI强度

Fig.9 CAI试件典型破坏模式 (a)15°试件正面；(b)15°试件侧面；(c)25°试件正面；(d)25°试件侧面；(e)35°试件正面；(f)35°试件侧面

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