玻璃钢/复合材料Issue(2)：26-31,6.
变刚度铺放改善单钉双剪螺栓连接拉伸强度
TENSILE STRENGTH IMPROVEMENT OF SINGLE BOLT DOUBLE SHEARING BY VARIABLE STIFFNESS PLACEMENT
摘要
Abstract
The variable stiffness placement along the direction of the maximum principal stress can enhance the strength of composite laminate.By focusing on the area around the hole,the optimization objective is defined as the minimization of the directional difference between the velocity vectors at the cells in the flow field and the maximum principal stress obtained by the FE.Based on this optimization objective,the optimum parameters of the flow field are calculated.Then the tape paths on the variable-stiffness ply are determined,what are consistent with the direction distribution of the maximum principal stress as far as possible.The comparative experiments of the laminates show that the average ultimate tensile strength of the variable stiffness laminates was increased.Moreover,the declining of the load bearing capability of the variable stiffness laminates is slowing when the tensile load exceeds the ultimate strength,which reduces the occurrence rate of instantaneous failure.关键词
变刚度铺放/单钉双剪螺栓连接/有势流场/最大主应力方向Key words
variable stiffness placement/single bolt double shearing joint/potential flow field/maximum principal stress direction分类
通用工业技术引用本文复制引用
牛雪娟,杨涛,李阳..变刚度铺放改善单钉双剪螺栓连接拉伸强度[J].玻璃钢/复合材料,2017,(2):26-31,6.基金项目
国家自然科学基金(11502164) （11502164）
