摘要
将拉伸螺杆简化为理论应力集中系数Kt不同的带“V”形缺口圆杆,采用裂纹尖端为20节点奇异单元的三维有限元模型,对螺杆半椭圆表面裂纹的应力强度因子进行了计算.给出了具有普遍性意义的螺杆表面裂纹应力强度因子公式.为验证本文计算结果的有效性,还将本文M22×1.5螺杆的应力强度因子计算结果与试验结果进行了对比.
By use of V notched round bars with different theoretical stress concentration factors as finite element models (FEM) of tensile screw threads, stress intensity factors(SIF) of surface cracks of screw threads are calculated. A universal SIF formula on surface cracks of screw threads is proposed. In addition, by comparison of the SIF results of M22×1.5 screw thread in this paper with experimental results, the effectiveness of the SIF results are shown.
出处
《力学与实践》
CSCD
北大核心
2003年第3期32-35,共4页
Mechanics in Engineering
基金
航空科学基金(01852012)
国家自然科学基金和江苏省自然科学基金项目资助
