摘要
建立锤击作用的有限元数学模型,利用该模型对白口铸铁焊补时锤击消除焊接残余应力进行实例分析。结果表明,在合适的焊接规范和工艺下,锤击不仅能有效地消除白口铸铁焊缝部位的应力,而且能促进热影响区拉伸残余应力的释放,甚至可以获得一定值的压应力。当在840℃~360℃温度区间进行锤击时,可以获得最佳效果。
According to the special feature of peening,a finite element model of peening was
constructed.Taking the white cast iron weld-reparied for example,the welding residual stress
effected by peening was analyzed.It is showed that peening is an effective method to relieve
welding residual stress. Under the suitable welding parameters and technique,peening not only
eliminated the stress in the bead ,but also improved the relief of the tensil residual stress ,even
acquired a certain compress stress, in the heat effected zone(HAZ).Peening in the temperature
range of 840℃ ̄360℃,the best results can be obtained.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
1999年第4期466-468,共3页
China Mechanical Engineering
基金
山东省自然科学基金
关键词
锤击
残余应力
数值模拟
焊接接头
白口铁
peening finite element
model residual stress white cast iron numerical simulation