特厚板多层多道焊的Marc有限元模拟.pdf

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第47卷第18期
机槭工程学报
Vol 47 No. 18
2011年9月
JOURNAL OF MECHANICAL ENGINEERJIING
2011
DOI:10.390I/JMIE.201118.037
特厚板多层多道焊的Marc有限元模拟
严仁军,2雷加静,2李鹏2李周3
(1.武汉理工大学高速船舶工程教育部重点实验室武汉430063
2.武汉理工大学交通学院武汉430063
3、苏州纽威阀门有限公司工艺研究部苏州215129)
摘要:厚板焊接残余应力场的影响因素众多,变化复杂,其应力分布模型的研究是此领域的难点之一,有关的试验样本尚不
多见。以两块100mm的厚板焊接为研究对象,试验模型材质为A105钢,采用埋弧焊,进行多道焊接。采用试验测量和
MSC.Marc有限元模拟相结合的方法,对100mm特厚板多层多道焊的残余应力进行对比分析研究,给出上表面横向残余应
力和纵向残余应力以及厚度方向残余应力的分布曲线。有限元计算结果与试验测量结果吻合较好,证明该有限元模型的合理
性。特别地,厚度方向残余应力可以通过有限元模型计算得出,解决了实际工程中厚板内部应力难得出的问题,为进一步研
究特厚板焊接残余应力提供参考依据
关键词:特厚板多层多道焊焊接残余应力Marc有限元模拟
中图分类号:TG402
Marc Finite Element Simulation in Special Thick Plate by Multi-pass and
Multi-layer Welding
YAN Renjun"LEI Jiajing"LI Peng"LI Zhou
(1. State Key Laboratory of High-speed Vessel of Ministry of Education
Wuhan University of Technology, Wuhan 430063
2. Transportation College, Wuhan University of Technology, Wuhan 430063
3. Department of Materials Science and Technology, Neway Valve(Suzhou )Co, Ltd, Suzhou 215129
Abstract: Residual stress of thick plate welding is affected by many factors and varied complicatedly. The research of residual stress
distribution model is one of the difficult points in this field, so the actual distribution measurement is very important. Two plates with
thickness of 100 mm are presented, which are made of A105 steel, subjected to multi-pass weld with submerged automatic arc
welding technology. Then experimental measurement and MSC Marc finite element simulation are combined to analyze the welding
residual stress distribution of 100 mm special thick plate by multi-pass and multi-layer welding. Then, distribution curves of
transverse residual stress and longitudinal residual stress on the top surface, and along the thick direction are given. The finite element
calculations are conie with he xe mn rels indicat at e fiie lement model established is reasonable. n
particular, the residual stressin the thick direction can be gained by the finite element result, which solves the problem about residual
stress is inconvenient to measure in the thick direction and offers reference for the future residual stress research work.
Key words: Special thick plate Multi-pass and multi-layer welding Welding residual stress Marc finite element simulation
厚板上多道焊接过程的残余应力沿厚度上分布的模
前言
型?,199年澳大利亚的 FREWIN等?对激光脉冲
焊接进行了有限元分析,提出了激光脉冲定位焊的
焊接残余应力是引起裂纹、导致接头强度和韧
维模型。2003年 VEIGA等研究了补焊中残余
性下降的重要原因。为了了解焊接结构中残余应力应力场的演变,2004年韩国的CHO等采用了有
的大小和分布,多年来不少专家学者做了大量的试限元模拟和试验相结合的方法,对多道焊的残余应
验和研究工作叫。1992年SHIM和FENG等开发了力场和焊后热处理进行了研究。国内对厚板焊接的
温度场和残余应力场也有研究6剧,然而部分是局限
高等学校学科创新引智计划资助项目(B08031)。20101229收到初稿
20110606收到修改稿
于有限元数值模拟而没有试验数据的验证,部分是