摘要
基于三维渐进损伤理论,研究了新型金属-复合材料搭接结构(由铝合金基片和双层CFRP复合材料增强结构组成)在铆接、胶接、混合连接等接头形式下,在静载作用下的失效形式,并进一步探讨了该结构在胶接中胶接参数对失效载荷的影响。结果表明:铆接接头的失效形式为铆钉剪切失效;胶接接头的失效形式为胶层失效;混合接头最初为胶层失效,后因铆钉剪切失效而整体失效;随着上胶层厚度的增加,结构的失效载荷先减少后增加,随着下胶层厚度的增加则先增加后减少;搭接结构的失效载荷随着胶接宽度的增加而逐渐增加;随着胶接长度的增加,搭接结构的失效载荷先逐渐增加后逐渐趋于稳定。
Based on three-dimensional progressive damage theory, the failure modes of the new metal-lap composite structure (consisting of aluminum alloy substrate and double CFRP composites reinforced structure) in the riveting, bonding and mixed connection form under the static load are investigated, respectively. Moreover, the influences of jointing parameters of this structure on the failure load are discussed. The results show that: The failure mode of rivet joint is shear failure of rivet. It is the failure of adhesive layer for the failure form of bonding. The hybrid joint was initially adhesive layer failure, and then overall failure due to shear failure of rivets. The failure load of the structure decreases first and then increases with the increase of the thickness of the up-adhesive, and increases first and then decreases with the increase of the thickness of the down-adhesive. As the bond width increases the failure load of the bond structure increases. When the bonding length increases, the failure load of the bond structure gradually increases first and then tends to be stable.
作者
熊勇坚
郑艳萍
夏小松
杨本宁
XIONG Yong-jian;ZHENG Yan-ping;XIA Xiao-song;YANG Ben-ning(School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China)
出处
《玻璃钢／复合材料》
CAS
北大核心
2019年第8期59-65,共7页
Fiber Reinforced Plastics/Composites
基金
国家自然科学基金:民用航空器碳纤维树脂基复合材料损伤失效探测研究(U1333201)
河南省高校重点科研项目:碳纤维复合材料混合连接结构损伤失效研究(20A460023)
关键词
搭接结构
胶接
胶层失效
失效载荷
overlap structure
bonding
cohesive failure
failure load
