摘要
根据弹塑性本构关系数学模型,采用组合热源模型与瞬态有限元方法,使用SYSWELD软件建立了TC21钛合金激光深熔焊过程三维有限元分析模型。依据熔池边界准则,通过改变激光功率、焊接速度,对TC21钛合金T型接头激光深熔焊的三维应力场进行了模拟研究。探讨了TC21钛合金横向残余应力的变化规律。研究表明,焊接速度对TC21钛合金横向残余应力峰值的影响较小,激光功率对于横向残余应力峰值的影响更明显一些;焊接速度对于横向残余应力梯度的影响较大,激光功率对于横向残余应力梯度的影响较小;随激光功率增大,横向残余压应力峰值显著减小,应力梯度也随之减小。
Based on the elastic-plastic constitutive mathematical model,a three dimensional finite element analysis model of TC21titanium alloy laser deep penetration welding is established in combination with heat source model and transient finite element method.On the basis of weld pool boundary criteria,by three-dimensional stress field of T joint of TC21titanium alloy laser deep,penetration welding is simulated by changing the laser power and welding speed.Variation regulation of transverse residual stress is discussed.
出处
《长江大学学报（自科版）（上旬）》
CAS
2013年第12期74-77,6,共4页
JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG
基金
教育部
财政部提升专业服务产业能力项目(2011-71)
安徽省专业带头人培养资金项目(2008-143-27)
关键词
钛合金
T型接头
激光深熔焊
应力场
数值模拟
titanium alloy
T joint
laser deep penetration weld
stress field
numerical simulation
