焊接坡口对焊接接头安定性的影响研究  

Effect of the Weld Groove Shape on the Shakedown Behavior of Butt Welded Joints

作　　者：郑小涛[1] 彭常飞[1] 喻九阳[1] 王明伍[1] 陈瑶[1] 

机构地区：[1]武汉工程大学机电工程学院,湖北武汉430205

出　　处：《压力容器》2012年第10期1-6,共6页Pressure Vessel Technology

基　　金：国家自然科学基金项目(NO.50976080);武汉工程大学科学研究基金项目(NO.14125061)

摘　　要：结合非线性叠加法和通用有限元软件ABAQUS研究了循环热-机械载荷下对焊接接头的安定性,并比较了UV形、双U形、X形、U形、单面焊及V形等6种焊接坡口形式对焊接接头安定性的影响。结果表明,选用U形坡口(焊接厚度20 mm≤t≤60 mm)及选用双U形坡口(焊接厚度t>60 mm)连接时焊接接头的安定域较大,在循环热-机械载荷下具有更好的承载能力。此研究对厚壁压力容器及管道对焊焊接接头的设计有一定指导意义。The shakedown behavior of butt welded joints under cyclic thermo-mechanical loadings was researched by ABAQUS according to the nonlinear superstition method.Six weld groove shapes of type UV-groove,double U-groove,X-groove,U-groove,single-side welding and V-groove were further studied.Results showed that the type U-groove for the welding thickness 20 mm≤t≤60 mm while the type double U-groove for the welding thickness t60 mm should be utilized for butt welded joints due to the greater shakedown region and thus the greater load carrying capacity under cyclic thermo-mechanical loadings.This study has some guidance significance for engineering designs of butt welded joints of thick pressure vessels and piping.

关 键 词：安定性 焊接接头 焊接坡口 热-机械载荷 

分 类 号：TH49[机械工程—机械制造及自动化] TG407[金属学及工艺—焊接]