摘要
采用复合材料连接型材的复合材料夹层结构连接节点具有轻质、防腐、无磁性等优点。该文试验研究复合材料夹层结构自插式平接胶结节点的受弯性能,重点考察连接型材的纤维铺设、节点搭接长度等因素对连接节点荷载-变形关系、应变发展规律和破坏模式的影响。试验结果表明,自插式平接节点的破坏形式主要表现为三类:节点连接区域的纤维面层与芯材的剥离破坏、搭接胶层剥离破坏、插入端变截面处纤维面层与芯材剥离破坏;连接型材纤维布的铺设方法与层数、胶结搭接长度以及节点区域的构造措施是影响节点承载力的主要因素。论文对平接节点的破坏机理进行了分析,研究成果对复合材料夹层板结构平接胶结节点的设计具有参考价值。
The joint of a composite sandwich structure with a composite connection-mode has advantages such as lightweight, anticorrosion and no magnetism. The experimental studies on the bending performance of insert adherence composite joints were carried out. The effects on the load-deformation behavior, strain-developing, failure modes from the fiber layout in the connection-mode and laps of splice were mainly investigated. The test results show that there are three types of failure modes, which include debonding failure between surface-layer and core material, debonding failure between overlaps and debonding failure between surface-layer and core material in variable cross-sections. It can be known that the configurations and lay-up design in the connection-mode, length of overlap mainly affect its strength. The failure mechanism of insert adherence joints was discussed. The results can be referred for the design of composite joints with a composite connection-mode.
出处
《工程力学》
EI
CSCD
北大核心
2015年第11期115-122,共8页
Engineering Mechanics
基金
国家自然科学基金项目(50978134)
江苏省建设管理局科研基金项目(JGJH2008-10)
南京工业大学青年教师学术基金重点项目
