碳纤维复合材料/钢的胶铆连接失效机理和选材方法

doi:10.16183/j.cnki.jsjtu.2021.344

摘要/Abstract

摘要：

为了揭示碳纤维复合材料(CFRP)与钢板连接设计中,母材厚度和强度对接头失效的影响规律,对CFRP层合板与DC05、HC260Y、DP590、DP780、DP1180、PHS1500钢板组成的胶接、铆接和胶铆混合接头进行单向和正向拉伸试验,分析各接头连接强度和失效模式,提出CFRP/钢接头母材厚度比和强度比的推荐范围.结果表明:CFRP/钢接头失效模式由较弱一侧母材强度和刚度决定,在连接设计中,应尽可能使两母材的强度和刚度相近;CFRP零件与相邻钢件厚度比的推荐范围为1.37~1.91,母材极限承载比的推荐范围为0.9~1.52.

关键词: 碳纤维复合材料层合板/钢板, 连接强度, 失效机理, 选材

Abstract:

To reveal the influence of material selection on joint properties in the joint design between carbon fiber reinforced polymer (CFRP) and steels, experiments of uniaxial tension and normal tension were performed on the bonded, riveted, and rivet-bonding joints, which were made of CFRP laminates and DC05, HC260Y, DP590, DP780, DP1180, and PHS1500 steel sheets. The failure modes and tensile strength of these joints were analyzed. The thickness ratio and bearing coefficient ratio of the CFRP parts and adjacent steel parts were summarized. The results show that the failure mode of the CFRP/steel joint depends on the mechanical properties of the material of the weaker side. During joint design, the strength and stiffness of the CFRP parts and adjacent parts should be as similar as possible. The thickness ratio of the CFRP parts and adjacent steel parts is recommended to be between 1.37 and 1.91, and the load bearing coefficient ratio is recommended to be between 0.9 and 1.52.

Key words: carbon fiber reinforced plymer (CFRP) laminate/steel, joining strength, failure mechanism, material selection

中图分类号:

TG496
TB333

余海燕, 吴航宇. 碳纤维复合材料/钢的胶铆连接失效机理和选材方法[J]. 上海交通大学学报, 2023, 57(2): 230-240.

YU Haiyan, WU Hangyu. Failure Mechanism and Material Selection Method of CFRP/Steel Rivet-Bonding Joints[J]. Journal of Shanghai Jiao Tong University, 2023, 57(2): 230-240.

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接头类型	单搭接			十字搭接
接头类型	胶接	铆接	胶铆混合	胶接	铆接	胶铆混合
CFRP/DC05	钢板与胶层的界面失效	钢板翘曲变形大,钢板中铆钉孔开裂	钢板翘曲变形,胶层开裂	钢板与胶层的界面失效	钢板弯曲变形大,CFRP板铆钉孔开裂	钢板弯曲变形大,胶层开裂、CFRP板分层
CFRP/HC260Y	同上	同上	同上	同上	同上	同上
CFRP/DP1180	胶层剪切断裂	CFRP板侧铆钉孔开裂	胶层剪切断裂	胶层剪切断裂	CFRP板弯裂	CFRP板弯裂
CFRP/PHS1500	胶层剪切断裂, CFRP板分层	同上	胶层剪切断裂,CFRP板分层	同上	同上	同上

板材	k	λ	板材	k	λ
CFRP	1.0	1.0	DP780	1.67	1.159
DC05	2.86	0.176	DP1180	1.67	1.052
HC260Y	2.50	0.226	PHS1500	1.25	1.699
DP590	1.67	0.668