Research on Fatigue Life of Resistance Projection Welding Joint for Thin-walled Cylindrical Shell under Internal Pressure
In order to improve the safety performance of projection welding joints during use,the finite element method and equivalent structural stress method were used to study the fatigue life prediction method for resistance projection welding joints of thin-walled cylindrical shells under internal pressure.A modeling method considering the influence of preloading on the shape of cylindrical shells was proposed,and the deformation of the cylinder and the fatigue life of projection welded joints under different preloading were calculated.The research results show that the deformation of thin-walled cylindrical shells at the projection welding joint has a significant impact on the fatigue life of the projection welding joint.It is recommended that measures shoud be taken to reduce the deformation of the cylindrical shell in the opening during the welding process,so as to obtain a higher fatigue life for the projection welded joint.
projection weldingthin-walled cylindrical shellwelding deformationequivalent structural stress methodFEA(Finite Element Analysis)
国家科技期刊平台
NSTL
万方数据
