Z-pin植入对碳纤维/环氧层合板弯曲性能的影响研究

doi:10.19936/j.cnki.2096-8000.20210328.014

复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (3): 88-92.DOI: 10.19936/j.cnki.2096-8000.20210328.014

Z-pin植入对碳纤维/环氧层合板弯曲性能的影响研究

严斌¹, 陈巍², 马承燕¹, 滕薛蓓¹, 刘维伟^1*, 李向前²

1.西北工业大学机电学院,西安710072;
2.中国航发上海商用航空发动机制造有限责任公司,上海200241

收稿日期:2020-08-07 出版日期:2021-03-28 发布日期:2021-04-30
通讯作者: 刘维伟(1970-),男,博士,副教授,主要从事先进复合材料结构设计与制造方面的研究,liuww@nwpu.edu.cn。
作者简介:严斌(1996-),男,硕士,主要从事复合材料层间增韧方面的研究。
基金资助:
中航工业商发改善铺层复材面内性能的Z-pin植入方式研究项目资助(2018MC050079)

EFFECT OF Z-PIN IMPLANTATION ON FLEXURAL PROPERTIES OF CARBON FIBER/EPOXY LAMINATES

YAN Bin¹, CHEN Wei², MA Cheng-yan¹, TENG Xue-bei¹, LIU Wei-wei^1*, LI Xiang-qian²

1. School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China;
2. AECC Shanghai Commercial Aviation Engine Manufacturing Co., Ltd., Shanghai 200241, China

Received:2020-08-07 Online:2021-03-28 Published:2021-04-30

摘要/Abstract

摘要： 通过三点弯曲试验研究了Z-pin材质、直径和加捻状态对Z-pin增强复合材料层合板弯曲性能的影响。结果表明相较于未增强对照组试件,碳纤维Z-pin增强组试件的弯曲强度、模量分别提升了20.28%与27.55%,且其提升效果要优于聚酰亚胺纤维Z-pin;小直径Z-pin组试件的弯曲强度、模量分别提升了19.96%与29.32%,且其提升效果要优于大直径Z-pin;Z-pin加捻与否对试件弯曲强度、模量的影响甚微,这与其失效形式有关。Z-pin植入试件后能大幅度提高试件的弯曲应变能,试验中相较于对照组试件,Z-pin增强组试件弯曲应变能的提升范围为15.23%~112.23%。其中,大直径Z-pin的提升效果最为显著,提升比率在110%以上。此外,Z-pin的植入会提高试件抵抗变形损伤的阻力,使试件表现出更大的失效位移,但弯曲应变能低的试件不易形成稳定的损伤扩展。

关键词: Z-pin, 弯曲性能, 桥联作用, 弯曲应变能, 复合材料

Abstract: This essay presents knowledge that the effect of material, diameter and twisting state of Z-pin on the flexural performance of Z-pin reinforced composite laminates,which was studied through three-point bending test. The results show that the flexural strength and modulus of the carbon fiber Z-pin group specimens have been increased by 20.28% and 27.55%, respectively, compared with the blank groups without Z-pin, and the improvement effect is better than that of the polyimide fiber Z-pin group. The flexural strength and modulus of small diameter Z-pin group specimens have been increased by 19.96% and 29.32%, respectively, compared with the blank groups without Z-pin, and the boost effect is better than that of the large-diameter Z-pin group. While the twisted state of Z-pin has little effect on the flexural performance, which is related to the mixed failure mode combined pullout with shear failure. After Z-pin is implanted into the test piece, it significantly improves the flexural strain energy of the test piece. In the test, the flexural strain energy of Z-pin reinforced specimens increased by 15.23%~112.23% compared with the blank groups without Z-pin. Among them, the effect of large diameter Z-pin is the most significant, and the lifting ratio is more than 110%. In addition, Z-pin implantation can increase the resistance of specimens to deformation damage, and make the specimens show greater failure displacement. But, the specimens with low flexural strain energy are not easy to form stable damage propagation.

Key words: Z-pin, flexural properties, bridging effect, flexural strain energy, composites

中图分类号:

TB332

严斌, 陈巍, 马承燕, 滕薛蓓, 刘维伟, 李向前. Z-pin植入对碳纤维/环氧层合板弯曲性能的影响研究[J]. 复合材料科学与工程, 2021, 0(3): 88-92.

YAN Bin, CHEN Wei, MA Cheng-yan, TENG Xue-bei, LIU Wei-wei, LI Xiang-qian. EFFECT OF Z-PIN IMPLANTATION ON FLEXURAL PROPERTIES OF CARBON FIBER/EPOXY LAMINATES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(3): 88-92.

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Z-pin植入对碳纤维/环氧层合板弯曲性能的影响研究

EFFECT OF Z-PIN IMPLANTATION ON FLEXURAL PROPERTIES OF CARBON FIBER/EPOXY LAMINATES

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