江西科学2024，Vol.42Issue(4)：809-812,875,5.DOI:10.13990/j.issn1001-3679.2024.04.019
压力管道对接焊缝焊趾应力集中研究
Research on Stress Concentration at the Toe of Butt Welds in Pressure Pipelines
摘要
Abstract
The safety assessment of planar defects in circumferential welds in the standard GB/T 19624-2019 mainly considers the sum of axial membrane stress and bending stress,but does not consider the influence of stress concentration effect on film stress.This paper is based on the struc-tural stress analysis method of ASME VIII weld fatigue.The influence of seam residual height h and seam width b of 14 mm plate thickness on the stress concentration of butt weld was analyzed by ABAQUS.The results show that when the width b is constant,the stress concentration coefficient Km of the weld structure increases with an increase of the residual height h.When the residual height h reaches a certain value,the Km value basically remains constant,and the maximal of the Km value depends on the width b.Consequently,the functional relationship between Km and width b within a specific residual height h and width b is proposed,as Km=0.97+0.021b.The research content has important engineering guiding value for the safety evaluation of pressure pipelines with defects and fatigue analysis of butt weld.关键词
安全评价/膜应力/对接焊缝/结构应力Key words
safety assessment/membrane stress/butt weld/structural stress分类
矿业与冶金引用本文复制引用
封小亮,马括,刘课秀..压力管道对接焊缝焊趾应力集中研究[J].江西科学,2024,42(4):809-812,875,5.基金项目
广东省市场监督管理局科技项目(2021CT06,2023CT11). （2021CT06,2023CT11）
