摘要
针对薄板构件焊接过程中压曲变形发生的力学机理，提出有源强化传热效应控制焊接压曲变形。应用数值方法研究了有源强化传热条件下的焊接温度场演变、分布及主要影响因素，为科学利用有源强化焊接传热效应提供了依据。研究表明，有源强化传热导致焊接温度场发生畸变，进而改变焊缝区压缩塑性应变量的大小与分布，从而达到有效地控制焊接应力与变形的目的。
The generating mechanism of buckling distortion of thin plates during welding is discussed.The controlling effectiveness of forc ed heat transfer on buckling distortion is conducted comprehensively and the c oncept of effect of forced-heat-transfer is presented.By using the finite diff erence method,the evolvement and shape of temperature fields of the specimens is simulated credibly.The key influential factors of temperature field are analyze d.The results of theoretical and experimental research illustrate that the effec t of forced heat-transfer can markedly reduce the residual stress and eliminat e the buckling distortion of thin plates during welding by deforming the welding temperature field to lower the level of compressing plastic deformation.The res ults also give directions for applying the effect of forced-heat-transfer effe ctively.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2000年第9期55-60,共6页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目
关键词
压曲变形
有源强化热效应
温度场
Thin plate Buckling distortion Critical
buckling compressing stress Effect of forced-heat-transfer Welding Temperature field
