“碳纤维复合材料/DC04钢”胶接剪切性能研究

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (5): 89-93.

“碳纤维复合材料/DC04钢”胶接剪切性能研究

张然然^1,2, 陈伊宁¹, 熊建民^1*, 苏一畅¹

1.众泰汽车工程研究院,杭州310018;
2.浙江大学材料科学与工程学院,杭州310027

收稿日期:2018-08-31 出版日期:2019-05-28 发布日期:2019-05-28
通讯作者: 熊建民(1981-),男,博士,主要从事汽车新材料应用等方面的研究,xiong.jianmin@zotye.com
作者简介:张然然(1990-),女,博士,主要从事碳纤维复合材料方面的研究

STUDY ON SHEAR PROPERTIES OF "CARBON FIBER REINFORCED POLYMERS/DC04" STEEL

ZHANG Ran-ran^1,2, CHEN Yi-ning¹, XIONG Jian-min^1*, SU Yi-chang¹

1.Zotye Automotive Engineering Research Institute, Hangzhou 310018, China;
2.School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

Received:2018-08-31 Online:2019-05-28 Published:2019-05-28

摘要/Abstract

摘要： 本文采用室温固化的高韧性环氧与丙烯酸酯两类结构胶对异种材料碳纤维复合材料(Carbon Fiber Reinforced Polymers,简称“CFRP”)和钢进行连接,分析了这两类结构胶的剪切强度、失效模式及环境耐久性。结果表明:高韧性环氧结构胶固化后剪切强度为23.5 MPa,胶层呈现以内聚破坏为主兼有界面破坏的失效模式;高韧性丙烯酸酯结构胶固化后的剪切强度为12.83 MPa,失效模式以界面破坏为主。此外,本文还探究了电泳烘烤工序对两类结构胶的剪切强度及失效模式的影响。环氧结构胶电泳烘烤后剪切强度为7.28 MPa,较电泳前降低69%,失效模式为胶层内聚破坏;丙烯酸酯结构胶电泳烘烤后剪切强度为15.65 MPa,较电泳前提高22%,破坏模式兼有胶层内聚破坏和基材破坏,可见电泳烘烤工序对不同类结构胶的剪切强度有不同的影响。因此,当CFRP件需随钢制车身电泳烘烤时,丙烯酸酯结构胶可满足剪切强度的要求。

关键词: 室温固化, 结构胶, 碳纤维复合材料, 钢, 剪切性能

Abstract: In this paper, room-temperature curing and high-toughness epoxy and acrylate structural adhesives were used to join the Carbon Fiber Reinforced Polymers (CFRP) and steel plates. The shear strength, failure mode and environmental durability of these two kinds of structural adhesives were analyzed. The results show that the shear strength of the high-toughness epoxy structural adhesive was 23.5 MPa after curing, and the failure modes were mainly cohesive failure as well as interface failure. And, the shear strength of the high-toughness acrylate structural adhesive was 12.83 MPa after curing, with the failure mode being dominated by interface failure. In addition, the paper also explored the effect of electrophoresis baking process on the shear strength and failure mode of two structural adhesives. The results show that the shear strength of the epoxy structural adhesive after electrophoresis was 7.28 MPa, which was 69% lower than that before electrophoresis, and the failure mode was cohesive failure of the adhesive layer. Besides, the strength of the acrylate structural adhesive was 15.65 MPa, which was 21.6% higher than that before electrophoresis. The failure modes were both cohesive failure and substrate failure. It could be seen that the electrophoretic baking process had different effects on the shear strength of different structural adhesives. When the CFRP parts need to be electrophoreled with the steel body, the acrylate structural adhesive can meet the requirement of shear strength.

Key words: room-temperature curing, structural adhesive, carbon fiber reinforced polymers, steel, shear properties

中图分类号:

TB332

张然然, 陈伊宁, 熊建民, 苏一畅. “碳纤维复合材料/DC04钢”胶接剪切性能研究[J]. 玻璃钢/复合材料, 2019, 0(5): 89-93.

ZHANG Ran-ran, CHEN Yi-ning, XIONG Jian-min, SU Yi-chang. STUDY ON SHEAR PROPERTIES OF "CARBON FIBER REINFORCED POLYMERS/DC04" STEEL[J]. Fiber Reinforced Plastics/Composites, 2019, 0(5): 89-93.

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