摘要
碳纤维增强复合材料(CFRP)加固钢板时,CFRP端部往往会发生剥离破坏而导致失效,文中重点研究了CFRP加固钢板的剥离机理.首先根据粘聚力理论建立了CFRP加固钢板的有限元模型;然后对CFRP加固钢板进行了静态拉伸试验研究,并利用试验数据验证了有限元模型;最后基于有限元模型对CFRP剥离破坏的机理进行了研究.分析结果表明:采用粘聚力理论建立的有限元模型可以准确模拟胶层剥离机理;胶层剪应力是CFRP剥离破坏的主要因素,整个过程经历了弹性变形、胶层软化和胶层剥离三个阶段;剥离破坏从CFRP端部开始,逐渐向中间发展,最终导致胶层完全失效.
The steel plate which is reinforced with carbon fiber reinforced polymer （CFRP） always debonds at the end. A finite element model of steel plate reinforced with CFRP is built,which is based on the cohesive force theory. Then the tensile experiment of steel plate reinforced by CFRP is modeled and simulated to verify the suggested finite element model. With this finite element model, the mechanism of CFRP debonding from the steel plate is studied carefully. The results show clearly that the cohesive method is suitable to analyze and capture the damage and failure processes in the steel plate reinforced with CFRP.
出处
《固体力学学报》
CAS
CSCD
北大核心
2015年第3期197-203,共7页
Chinese Journal of Solid Mechanics
基金
国家863课题项目
工程机械共性部件再制造关键技术及示范项目(2013AA040203)
国家青年基金项目
复杂激励下变姿态超长柔性机械臂振动机理辨识及主动控制研究项目(51305045)资助
