表面形貌对GFRP/铝合金粘接剪切强度的影响研究

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (10): 51-55.

表面形貌对GFRP/铝合金粘接剪切强度的影响研究

郭锋, 孙士勇^*, 杨睿, 李盼

大连理工大学机械工程学院,大连116024

收稿日期:2018-03-28 出版日期:2018-10-28 发布日期:2018-10-28
通讯作者: 孙士勇(1981-),男,博士,副教授,主要从事复合材料方面的研究,sunshy@dlut.edu.cn。
作者简介:郭锋(1992-),男,硕士研究生,主要从事复合材料方面的研究。
基金资助:
辽宁省自然科学基金(20170540161);中央高校基本科研业务费专项资金(DUT18JC27)

EFFECT OF SURFACE TOPOGRAPHY ON THE ADHESIVE SHEAR STRENGTH FOR GFRP AND ALUMINUM ALLOY BONDING

GUO Feng, SUN Shi-yong^*, YANG Rui, LI Pan

School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China

Received:2018-03-28 Online:2018-10-28 Published:2018-10-28

摘要/Abstract

摘要： 在玻璃纤维增强树脂基复合材料(GFRP)和金属的粘接中,粘接界面是整个粘接结构中最薄弱的环节。为了研究金属的表面形貌对GFRP/金属粘接强度的影响,采用不同型号的砂纸磨削铝合金表面以获得不同的金属表面形貌,进而用共固化工艺制备了GFRP/铝合金单搭接试件,通过剪切实验研究了表面粗糙度评定参数R_c(轮廓单元的平均高度)、R_sm(轮廓单元的平均宽度)、R_lo(粗糙度被测的轮廓长度)与粘接剪切强度的关系,在此基础上,分析了粘接剪切强度随R_sm和R_c比值的变化情况。结果表明,太粗糙的表面不利于GFRP与铝合金的粘接,只有R_sm与R_c的比值保持在合理范围内时,树脂胶粘剂才能充分填充金属表面轮廓,此时,R_lo是粘接强度的主要影响因素。

关键词: 粘接强度, GFRP, 表面粗糙度, 剪切实验

Abstract: The bonding interface is the weakest place in the bonding of glass fiber reinforced plastic (GFRP)and metal plate. In order to study the effect of metal surface topography on the bonding strength of GFRP and metal plate, different aluminum alloy surface topography was obtained by grinding with different types of sand paper. After grinding, the aluminum alloy was used to prepare single lap joint of GFRP and aluminum alloy by co-curing process. The shear test was carried out to study the relationship between roughness parameters R_c (mean height of profile elements), R_sm (mean width of the profile elements), R_lo (developed length) and shear strength. On this basis, the change trend of shear strength with the ratio of R_sm to R_c is studied. The results show that too rough surface is not conducive to the bonding of GFRP and aluminum alloy. When the ratio of R_sm to R_c is in a reasonable range, the adhesive can fully fill the surface profile of aluminum alloy and R_lo is the main influencing factor of bonding strength.

Key words: bonding strength, GFRP, surface roughness, shear test

中图分类号:

TB332

郭锋, 孙士勇, 杨睿, 李盼. 表面形貌对GFRP/铝合金粘接剪切强度的影响研究[J]. 玻璃钢/复合材料, 2018, 0(10): 51-55.

GUO Feng, SUN Shi-yong, YANG Rui, LI Pan. EFFECT OF SURFACE TOPOGRAPHY ON THE ADHESIVE SHEAR STRENGTH FOR GFRP AND ALUMINUM ALLOY BONDING[J]. Fiber Reinforced Plastics/Composites, 2018, 0(10): 51-55.

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