大载荷承力支架结构用碳/环氧承力管金属整体接头的结构设计

某大载荷承力支架结构采用碳／环氧管作为主承力构件，利用金属接头把承力管、前端框和后端板连接成整体支架。利用有限元分析软件ANSYS7．0对承力支架结构进行了总体静力分析，并分析了接头的局部受力状态。根据接头的受力状态，结合胶接失效模型设计了整体接头叉形部分长度为50mm，并根据最大弯曲正应力设计了接头的壁厚为3mm，设计表明整体接头许用拉伸强度为250MPa，可满足承力支架的承栽要求。

Structural Design of Integrated Metal Joint for Primary Load Bearing Carbon/Epoxy Tubes of a Large Load Bearing Structure

Carbon/Epoxy tubes are used as the primary load bearing components of a truss structure under large loads.Metal joints are employed to join the tubes, front rim and rear board into an integrated truss structure. Global static mechanical analysis of the truss structure is done by finite element analysis program ANSYS7.0 and the local stress state of the joint is analyzed. According to the local stress state of the joint and bonding failure model, the length of the Y-shaped part of the joint is designed and the wall thickness of the joint is designed according to the maximum bending stress model.The design results show that the integral joint can meet the service requirement when the length of the Y-shaped part is 50 mm and the wall thickness of the joint is 3 mm.