CLAM钢TIG焊接头温度场和应力场数值模拟  

Numerical simulation on temperature and stress fields of CLAM steel TIG weld

作　　者：雷玉成[1] 朱强[1] 尹莎[1] 巨新[2] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]北京科技大学物理系,北京100083

出　　处：《江苏大学学报（自然科学版）》2011年第2期163-166,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51075191);江苏大学科技创新团队项目(JD000019);江苏省研究生创新计划项目(CX09B_15Z)

摘　　要：运用ANSYS的热-结构耦合技术,采用APDL参数化语言及生死单元技术,以双椭球热源作为内热源,对CLAM钢TIG焊对接单层焊和单面双层焊的温度场进行了数值模拟.在不考虑焊接温度场对材料相变影响,而仅考虑对残余应力场影响的条件下,以温度场的计算数据为依据进行应力场的计算,并将应力场的模拟结果与试验结果进行比较.分析结果表明:焊件残余应力的实测值和模拟结果中残余应力分布比较吻合;在焊件截面上表面,纵向残余应力在近缝区为拉应力,且在熔合区附近达到最大,而远离焊缝处转变为压应力;横向残余应力比较小,且均为拉应力;单面双层焊件表面残余应力比单层焊件的残余应力小.ANSYS thermal-structural coupling technology,Parametric Design Language,life-death element technique,and double ellipsoid heat source were applied togegher in the numerical simulation of temperature and stress fields on single layer welding and the single-sided double layer welding of CLAM steel TIG weld joints.Without considering phase change and only considering the effects of residual stress field,the stress field based on temperature field data was calculated.The results of simulation with that of experiment were compared.The numerical results of residual stress distribution are almost consistent with the experimental ones.On middle section of the surface,longitudinal stress is tensile stress near the weld zone,reaches the maximum in the fusion area,and turn to compressive stress away from weld zone.The transverse stress is small tensile stress.Residual stress of single-sided double-layer welding specimen is lower than that of single layer welding specimen.

关 键 词：CLAM钢 有限元分析 温度场 应力场 数值模拟 

分 类 号：TG404[金属学及工艺—焊接]