咬边缺陷对压力管道焊接接头应力集中的研究

Study on Effects of Undercut Defect on Stress Concentration in Welding Joint of Pressure Pipe

从数值模拟入手,采用大型有限元软件ANSYS研究了不同尺寸、不同位置的咬边缺陷对压力管道焊接接头应力集中系数的影响。计算结果表明,咬边缺陷对压力管道焊接接头产生了十分明显的应力集中,其影响程度与咬边的深度、宽度和位置有关,锐度越大应力集中系数就越大。

This paper researches the effects of undercut defect on stress concentration in welding joint of pressure pipe by means of the finite element method software ANSYS.The results indicate,the influence of undercut defect on stress concentration in welding joint of pressure pipe was related to the depth,width and the distributing position of the undercut.With the deeper undercut or the narrower undercut,the stress concentration is increased.