Numerical Analysis of the Influence of Residual Stresses on the Mechanical Properties of Weld Thick Steel Plates
Welded thick steel plates are widely applied in the engineering.Due to their thickness, the problems of residual stresses caused by the temperature gradient and uneven shrinkage are very prominent in the welding process compared with ordinary steel plates, which will produce great effect on the mechanical properties of members, and further affect the safety, applicability and sustainability of structures.In the related numerical analyses of the present literatures, the residual stresses are assumed to be biaxial and are neglected in the thickness direction.This assumption does not agree with actual situation and is unreasonable and inaccurate.In addition, systematical research on the residual stresses of plates has not been conducted.In view of this,trixial residual stresses of plates with thickness of 40 mm under pure bending were analyzed using by ABAQUS subroutine.The results show that, the residual stresses accelerate the plastic development, leading to stiffness degradation and deformation increase.With the augment of the loads, the influence of residual stresses decreases gradually owing to redistribution of cross-section in the elastoplastic region.
Fan Bai Chao Su Xiaofeng Wang Na Yang
School of Civil Engineering, Beijing Jiaotong University, Beijing, China
国际会议
哈尔滨
英文
436-440
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）