极限温度下的CFRP-铝合金粘接接头耐久性研究*

doi:10.19562/j.chinasae.qcgc.2020.07.020

汽车工程 ›› 2020, Vol. 42 ›› Issue (7): 985-992.doi: 10.19562/j.chinasae.qcgc.2020.07.020

• • 上一篇

极限温度下的CFRP-铝合金粘接接头耐久性研究^*

慕文龙^1,2, 那景新¹, 秦国锋³, 谭伟¹, 高原¹, 申浩¹

1.吉林大学,汽车仿真与控制国家重点实验室,长春 130022;
2.吉林大学电子显微镜中心,长春 130012;
3.广西师范大学职业技术师范学院,桂林 541004

收稿日期:2019-01-04 出版日期:2020-07-25 发布日期:2020-08-14
通讯作者: 慕文龙,博士研究生,E-mail:muwl1992@hotmail.com。
基金资助:
*国家自然科学基金(51775230)和吉林大学研究生创新基金(101832018C198)资助。

Study on Durability of Adhesively Bonded CFRP-Aluminum Alloy Joints Exposed to Extreme Temperatures

Mu Wenlong^1,2, Na Jingxin¹, Qin Guofeng³, Tan Wei¹, Gao Yuan¹, Shen Hao¹

1. Jilin University, State Key Laboratory of Automotive Simulation and Control, Changchun 130022;
2. Electron Microscopy Center, Jilin University, Changchun 130012;
3. Teachers College for Vocational and Technical Education, Guangxi Normal University, Guilin 541004

Received:2019-01-04 Online:2020-07-25 Published:2020-08-14

摘要/Abstract

摘要： 对碳纤维增强复合材料(CFRP)粘接接头在极限温度下的耐久性进行了研究。分析CFRP表面粗糙度对粘接性能的影响,并制作了AL-AL和CFRP-AL单搭接接头,分别测试80和-40 ℃环境下不同老化周期后的接头失效载荷。结果表明:砂纸打磨能有效提升CFRP粘接效果。但随着粗糙度进一步增加,CFRP-AL接头承载能力逐渐降低;在高温下,AL-Al接头性能由胶粘剂后固化决定,而CFRP-AL接头高温耐久性受到胶粘剂后固化和CFRP老化的共同影响;低温老化对AL-Al接头性能无明显影响,而CFRP-AL接头失效载荷在热应力的影响下出现下降。最后建立了CFRP-AL接头内聚力模型,定义了温度退化因子,实现极限温度持续作用下的接头失效预测。

关键词: 碳纤维增强复合材料, 粘接接头, 极限温度, 耐久性, 内聚力模型

Abstract: The durability of adhesively bonded carbon fiber reinforced polymer (CFRP) joints under extreme temperatures is studied. The effects of CFRP surface roughness on bonding strength are analyzed, the AL-AL and CFRP-AL single-lap joints are manufactured with their failure loads measured at 80℃ and -40℃ in different aging periods. The results show that the bonding loads of CFRP can be increased effectively through surface roughening with sandpapers. But with the roughness further increases, the load-bearing capacity of CFRP-AL joint gradually falls. Under high temperature condition, the bonding performance of AL-AL joint is determined by post-curing of adhesive, while the durability of CFRP-AL joint is affected by both the post-curing of adhesive and the aging of CFRP. Low temperature aging has no obvious effects on the performances of AL-AL joints, while the failure loads of CFRP-AL joints reduce under the ef-fects of thermal stress. In the end, the cohesion model of CFRP-AL joint is established, with the temperature degradation factors defined, achieving the joint failure prediction under the continu-ous action of extreme temperatures.

Key words: carbon fiber reinforced polymer composites, adhesively bonded joint, extreme temperature, durability, cohesion model

慕文龙, 那景新, 秦国锋, 谭伟, 高原, 申浩. 极限温度下的CFRP-铝合金粘接接头耐久性研究^*[J]. 汽车工程, 2020, 42(7): 985-992.

Mu Wenlong, Na Jingxin, Qin Guofeng, Tan Wei, Gao Yuan, Shen Hao. Study on Durability of Adhesively Bonded CFRP-Aluminum Alloy Joints Exposed to Extreme Temperatures[J]. Automotive Engineering, 2020, 42(7): 985-992.

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极限温度下的CFRP-铝合金粘接接头耐久性研究^*

Study on Durability of Adhesively Bonded CFRP-Aluminum Alloy Joints Exposed to Extreme Temperatures

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