复合材料层合板单搭接机械连接横向力研究  

Study on the Lateral Force of the Single Lap Joint of Composite Laminates

作　　者：张志宏 张博平[1] 杨杰 

机构地区：[1]西北工业大学航空学院,西安710072 [2]第一飞机设计研究院结构设计研究所,西安710089

出　　处：《航空工程进展》2018年第1期84-90,共7页Advances in Aeronautical Science and Engineering

摘　　要：在复合材料单搭接连接结构中,由于载荷的偏心作用,在搭接处产生沿板厚度方向的横向力,使得接头产生横向位移并使螺栓偏转。采用试验及有限元方法对复合材料双钉单搭接机械连接中螺栓、螺母在静载荷作用下的应力进行研究,并进行结果分析。结果表明:单搭接中偏心矩在螺栓上的螺纹位置产生较大的应力,使螺栓发生断裂破坏;在螺母中产生较大的弯曲应力,使螺母发生破坏;在连接区两端对层合板施加横向约束能够有效降低螺栓、螺母中的应力幅值;计算结果与试验破坏模式吻合。In the composite material single lap joint structure,due to the eccentricity of the load,the lateral force is generated in the lap joint,which causes the lateral displacement of the joint and deflects the bolt.The stress distribution of bolt and nut under static load is studied by experiment and finite element method.The results is compared.Results show that eccentric moment in the single lap produces a strong stress in the thread position of the bolt,resulting in the fracture failure of the bolt.And a strong circumferential stress raising in the nut,causing the nut to break.The lateral constraints on the laminated plates can effectively reduce the stress amplitude in the bolts and nuts.The calculated results agree with the test failure mode.

关 键 词：复合材料 单搭接 螺栓 横向力 应力集中 

分 类 号：V257[一般工业技术—材料科学与工程]