第2卷第2期Vol.2No.22023年4月JournalofArmyEngineeringUniversityofPLAApr.2023X80钢曲面对接焊缝残余应力尺寸效应白林越1,高磊1,邵飞1,谢兴坤1,刘义2,张龙3(1.陆军工程大学野战工程学院,江苏南京210007;2.陆军工程大学训练基地,江苏徐州220014;3.31650部队,云南曲靖655000)摘要:以试验测得的X80钢高温性能参数为基础建立了曲面对焊结构仿真模型,并进行了试验验证,研究了曲面外径、曲面壁厚和焊缝宽度等尺寸效应对曲面对接焊缝残余应力分布的影响规律。结果表明:曲面外径、曲面壁厚和焊缝宽度的变化均会对曲面对接焊缝残余应力的分布规律产生影响;随着曲面径向截面面积的增大,焊趾处径向残余拉应力逐渐增大,残余压应力峰值逐渐减小;曲面径向截面面积和焊缝宽度的增加,均会引起焊趾处残余拉应力峰值的增大并导致曲面对焊结构中焊接残余应力水平的升高,降低结构整体的耐腐蚀性能和疲劳性能;在选用曲面壁厚小于4mm的曲面结构进行工程设计时,焊接残余应力分布对壁厚的变化十分敏感,极易导致结构内部残余拉应力的增大并产生应力集中区域。关键词:曲面对焊结构;焊接残余应力;曲面外径;曲面壁厚;焊缝宽度中图分类号:TG457DOI:10.12018/j.issn.2097-0730.20220526001DimensionalEffectsonWeldingResidualStressofCurvedButtWeldofX80SteelBAILinyue1,GAOLei1,SHAOFei1,XIEXingkun1,LIUYi2,ZHANGLong3(1.CollegeofFieldEngineering,ArmyEngineeringUniversityofPLA,Nanjing210007,China;2.TrainingBase,ArmyEngineeringUniversityofPLA,Xuzhou220014,China;3.Unit31650ofPLA,Qujing655000,China)Abstract:BasedonthehightemperatureperformanceparametersofX80steelmeasuredintheexperi-ment,asimulationmodelofthecurvedbutt-weldedstructurewasestablishedandverifiedbythetest.Theeffectsofcurvedouterdiameter,curvedwallthickness,andweldwidthontheresidualstressdistributionofthecurvedbutt-weldedjointwerestudied.Thetestresultsshowthatthevariationofcurvedouterdi-ameter,curvedwallthicknessandweldwidthwillaffecttheresidualstressdistributionofcurvedbutt-weldedjoint.Withtheincreaseofthecurvedradialsectionarea,theradialresidualtensilestressintheweldtoerisesgradually,andthepeakvalueofresidualcompressivestressdecreasesgradually.Theaug-mentofthecurvedradialsectionareaandtheweldwidthwillincreasethepeakvalueofresidual...
