Calculation and Prediction of Spherical and Ellipsoidal Defect Stress in Straight Butt Weld
Spherical and ellipsoidal pores are common volume defects in butt welds.In order to better evaluate and study these defects,finite element method was used to analyze and calculate the stress of spherical and ellipsoidal defects in different welds.The results show that the stress at the inner wall of the defect is the largest,and the stress decreases gradually with the increase of the distance of defects to inner wall,and the stress of ellipsoidal defect is related to the sharpness of the defect and its position distribution in the weld.The stress prediction equations of spherical and ellipsoidal defects at different weld positions were obtained by fitting and analyzing the stress data at different directions and thickness positions of the defects with functional equations.Therefore,the above stress prediction equation can be used to evaluate the service risk of spherical and ellipsoidal defects found in the inspection process.
NETL
NSTL
万方数据
维普
