摘要
推导出螺栓螺纹根部最大圆弧半径与螺母螺纹小径处的削平高度、螺距的关系,探讨了增大圆弧半径的途径;应用有限元方法分析了钢轨螺栓螺纹根部圆弧半径对其最大轴向拉应力的影响。研究结果表明:适当增大螺母螺纹小径处的削平高度,可以增大螺纹根部最大圆孤半径,缓解螺纹根部的应力集中,改善了应力分布,提高了螺栓的强度。
The relation formula for the largest radius of rounded root of bolt with the cutting depth at the root of the nut, and the pitch of the nut is given. By using Finite Element Analysis method, this paper investigates the influence of the radius of rounded root of rail bolt on the maxim axial tension. The results indicate that increas ing the cutting depth at the root of the nut properly, the stress concentration at the root of rail bolt will be reduced, and the stress distributing will also be ameliorated.
出处
《天津工程师范学院学报》
2006年第2期5-7,共3页
Journal of Tianji University of Technology and Education
基金
劳动和社会保障部科技项目(LB2005-06)
关键词
螺栓
钢轨
有限元法
强度
bolt
rail
finite element
strength
