胶层厚度对复合材料胶连接强度的影响

doi:10.3901/JME.2025.04.127

机械工程学报 ›› 2025, Vol. 61 ›› Issue (4): 127-136.doi: 10.3901/JME.2025.04.127

• 材料科学与工程 • 上一篇

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胶层厚度对复合材料胶连接强度的影响

马毓^1,2, 王洪建^1,2,3, 马海伍合日¹

1. 重庆工商大学机械工程学院重庆 400067;
2. 重庆工商大学制造装备机构设计与控制重庆市重点实验室重庆 400067;
3. 重庆工商大学机器人与激光智能制造研究所重庆 400067

收稿日期:2024-02-19 修回日期:2024-09-06 发布日期:2025-04-14
作者简介:马毓，男，1981年出生，博士，实验师。主要研究方向为复合材料结构及连接。E-mail：54320197@qq.com
基金资助:
国家自然科学基金委员会-中国工程物理研究院联合基金(U2030120)、国家重点研发计划(2018YFB1306602)、重庆市自然科学基金(cstc2019jcyj-msxmX0088)、重庆市技术创新与应用发展(CSTB2022TIAD-LDX0014)和重庆工商大学重点实验室开放平台基金(KFJJ2018094，KFJJ2017052，KFJJ2016031，1952038)资助项目。

Effect of Adhesive Thickness on Bonding Strength of the Adhesive Composite Joint

MA Yu^1,2, WANG Hongjian^1,2,3, MAHAI Wuheri¹

1. College of Mechanical Engineering, Chongqing Technology and Business University, Chongqing 400067;
2. Chongqing Key Laboratory of Manufacturing Equipment Mechanism Design and Control, Chongqing Technology and Business University, Chongqing 400067;
3. Smart Manufacture Institute of Robot and Laser, Chongqing Technology and Business University, Chongqing 400067

Received:2024-02-19 Revised:2024-09-06 Published:2025-04-14

摘要/Abstract

摘要： 为研究胶层厚度变化对复合材料胶连接强度的影响理论计算与试验相悖的问题，选定SJK-03型粘钢胶粘接无碱玻璃纤维/聚氨酯拉挤扁条(内搭接板)和Q235钢板(外搭接板)，制作的双搭接胶连接接头为研究对象。由于此型粘胶剂的建议使用厚度为1～3 mm，故从1 mm到3 mm变化胶层厚度，共进行了两类共60个接头试件的拉伸试验。第一类试验中接头的搭接长度取为90 mm，测定随胶层厚度变化，接头破坏荷载的变化规律，并计算得胶层剪切应变能的变化规律，表明随着胶层厚度增加，胶层剪切应变能降低，胶连接强度减小。第二类试验中接头的搭接长度取为3 mm，测定特定胶层厚度所对应的胶层剪切应变能，由测定数据计算所得胶连接强度，与第一类试验中的试验值及其变化趋势基本相符；且考虑安全系数后，计算所得胶连接强度能基本包络试验值的下限。两类试验相互验证，结论可解释胶层厚度变化对复合材料胶连接强度的影响理论计算与试验相悖的原因，也可参考用于修正现有胶连接强度计算方法。

关键词: 胶连接接头, 双搭接, 胶连接强度, 胶层厚度, 剪切应变能

Abstract: To investigate the theory contradicted practice problem for the influence of adhesive thickness on the bonding strength of the adhesive composite joint, SJK-03 adhesive is used to bond the adhesive double-lap joint tensile specimens, the inner lap is alkali-free glass fiber/polyurethane resin pultruded flat bar, the outer lap is Q235 steel plate. For the thickness of this adhesive layer is suggested between 1 mm to 3 mm by the adhesive instructions, a total of two types 60 tensile specimens are carried out with adhesive thickness (from 1 mm to 3 mm) as variable parameter. The overlap length of the first type is 90 mm, they are used to measure the loading capability for different adhesive thickness, then the test data is used to calculated the adhesive layer shearing strain energy for corresponding adhesive thickness. The result demonstrates that the adhesive layer shearing strain energy is not invariant, it decreases with adhesive thickness increases. The overlap length of the second type is 3 mm, they are used to measure the adhesive layer shearing strain energy for specific adhesive thickness, then the test data is used to calculated the loading capability. The results and their variation tendency are consistent with the loading capability of the first type test. The safety factor is quoted to calculate the loading capability after that, the results envelope the lower limit of the loading capability of the first type test. The two types tests verify each other, which can explain the contradiction problem and be used as a reference in the bonding strength calculation of the adhesive composite joint design.

Key words: adhesive joint, double-lap, bonding strength, adhesive thickness, shearing strain energy

中图分类号:

TB301

马毓, 王洪建, 马海伍合日. 胶层厚度对复合材料胶连接强度的影响[J]. 机械工程学报, 2025, 61(4): 127-136.

MA Yu, WANG Hongjian, MAHAI Wuheri. Effect of Adhesive Thickness on Bonding Strength of the Adhesive Composite Joint[J]. Journal of Mechanical Engineering, 2025, 61(4): 127-136.

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胶层厚度对复合材料胶连接强度的影响

Effect of Adhesive Thickness on Bonding Strength of the Adhesive Composite Joint

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