Calculation about Stress Concentration Coefficient of Welded Cruciform Joints Based on the ABAQUS

摘要

Stress concentration coefficient of welded joints has a crucial influence on mechanical properties of welded structures.Geometrical parameters of welded joints seriously affect the stress concentration coefficient.In order to increase the mechanical properties and using safety of welded structures,it has great significance for reducing stress concentration coefficient and improving the mechanical properties of welded structures by researching and improving the geometry of welded joints.In this paper,the effect of the weld tangent line angle θ on the stress concentration coefficient of welded cruciform joints were analyzed by using ABAQUS finite element program,and the change rule of stress concentration coefficient with the variation of the parameter was also researched.The calculation results indicate that reducing the weld tangent line angle θ can effectively decrease the stress concentration coefficient of welded cruciform joints,so as to improve the mechanical properties of welded structures.For the safe use of welded structures,the true weld tangent line angle θ should be smaller than 30°.