Experimental study on interfacial adhesive properties between twisted z-pin and laminates

被引：10

作者：

Wang, Xiao-Xu ^{[1
]}

Chen, Li ^{[1
]}

Jiao, Ya-Nan ^{[1
]}

Li, Jia-Lu ^{[1
]}

机构：

[1] Key Laboratory of Advanced Textile Composite Materials Ministry of Education, Institute of Composites, Tianjin Polytechnic University, Tianjin

来源：

Guti Huojian Jishu/Journal of Solid Rocket Technology | 2014年 / 37卷 / 06期

关键词：

Interfacial adhesive property; Laminate composite; Pull-out test; Twisting; Z-pin;

D O I：

10.7673/j.issn.1006-2793.2014.06.022

中图分类号：

O63 [高分子化学（高聚物）]; TQ31 [高分子化合物工业（高聚物工业）];

学科分类号：

070305 ; 0805 ; 080501 ; 080502 ; 081704 ;

摘要：

Five types of twisted z-pins(the twist degree are 1, 2, 2.5, 3 and 4 n/cm respectively) were prepared by means of draw forming from small-cavity mold and twisting before resin curing. Appearances of various twisted z-pins were observed, and the tensile properties of various twisted z-pins were tested. The interfacial adhesive properties between z-pins and laminates were characterized through single z-pin pull-out tests. The results show that twisting makes the stems of the z-pins distorted, the more twist degree is, the more distortion is. Twisting makes the tensile strength and the elongation reduce by about 50%, and the tensile modulus decreases by 30%. However, twisting improves the interfacial adhesive properties between z-pins and laminates significantly. The more the twist degree is, the higher the interfacial sheer strength τd, the maximum frictional force Ff, and the pull-out energy Wp are. With the increase of twist degree, the debonding location shifts from the F-R meso-interface between its fiber and resin of z-pin to the R-R meso-interface between the outer resin of z-pin and the resin of laminates. For the z-pin with twist degree of 3 n/cm, the τd is improved by 61%, Ff and Wp are all tripled. ©, 2014, Journal of Solid Rocket Technology. All right reserved.

引用

页码：856 / 862

页数：6

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