基于MSC.Marc的平板对接接头残余应力分布规律及影响因素  

Distribution Law and Influencing Factors of Residual Stress in Flat Butt Joint Based on MSC.Marc

作　　者：陈丽 苏建榕 陈锴 罗永锋 黄章涛 CHEN Li;SU Jianrong;CHEN Kai;LUO Yongfeng;HUANG Zhangtao(Dept,of Material Engineering,Fuzhou University Zhicheng College,Fuzhou 350002,China;College of Materials Science and Engineering,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福州大学至诚学院材料工程系,福建福州350002 [2]福州大学材料科学与工程学院,福建福州350116

出　　处：《热加工工艺》2021年第23期135-138,145,共5页Hot Working Technology

基　　金：福建省教育厅中青年教师教育科研资助项目(JAT200934);福建省大学生创新创业训练计划资助项目(S202013470006)。

摘　　要：采用数值模拟方法能较准确地预测焊后残余应力,且周期短、较经济。采用MSC. Marc有限元软件对低碳钢平板对接接头残余应力分布进行规律性研究和预测,模拟研究构件尺寸变化对焊接接头残余应力分布规律的影响。结果表明:纵向应力在焊缝及附近区域表现为拉应力,在焊缝两侧的母材处表现压应力;横向应力在焊缝的始端和末端处表现为压应力,在焊缝中段处表现为拉应力。应力分布情况与构件尺寸大小有关,选择合适的尺寸有利于构件整体应力分布趋于均匀化,可有效地减小接头局部应力集中,提高接头质量和承载能力。The application of numerical simulation method can predict the residual stress after welding accurately, and the cycle is short and economical. The MSC. Marc finite element software was used to study and predict the regularity of the residual stress distribution of low carbon steel flat butt welded joint, and to simulate the influence of component size change on the residual stress distribution of the welded joint. The results show that the longitudinal stress appears as tensile stress in the weld and the vicinity, and compressive stress in the base material on both sides of the weld;the transverse stress in the beginning and end of the weld appears as compressive stress, and in the middle of the weld as tensile stress. The stress distribution is related to the size of the component. Choosing appropriate size is conducive to the uniform stress distribution of the component, which can effectively reduce the local stress concentration of the joint and improve the quality and bearing capacity of the joint.

关 键 词：横向应力 纵向应力 构件尺寸 对接接头 数值模拟 

分 类 号：TG404[金属学及工艺—焊接]