焊接过程瞬态温度场与残余应力场
Transient Temperature Fields and Residual Stress Fields of Metallic Materials under Welding
-
摘要: 本文根据焊接热传导及热弹塑性的研究现状,对如下两个问题进行了探讨.首先,采用非线性问题线性化的方法对非线性非定常温度场问题的边界元法做了改进,并将其用于焊接热传导分析:其次,提出“等放线膨胀系数法”考虑相变对于应力场的影响,并将其用于焊接热弹塑性分析.实例的数值计算结果与实测数据的对比分析表明本文方法行之有效.Abstract: Based on the situation of welding thermal conduction and thermo-elasto-plasticity research, this paper explores some problems in this field. First, the boundary element method for nonlinear problems is improved by linearization of nonlinear problems and used in welding thermal conduction analysis. Second, the thermo-elasto-plastic finite element method is used for the welding stress calculation, in which the phase transformation is considered by the "equivalent linear expansion coefficient method".The comparison of the calculated results with experimental data shows that the methods provided in this paper are available.
-
Key words:
- weld /
- thermal conduction /
- phase transformation /
- residual stress
-
[1] Wrobel,L.C.and C.A.Brebbia,The dual reciprocity boundary element formulation for nonlinear diffusion problems,Computer Methods in Applied Mechanics and Engineering,65,2(1987). [2] Brebbia,C.A.,Progress in Boundary Element Methods,2,Pentech Press(1983). [3] Yuan Fa-rong and Wu Shangh-li,Transient-temperature and residual-stress fields in axisymmetric metal components after hardening,Materials Science and Technology,1,10(1985). [4] 陈楚、江建华等,热弹塑性有限元法求解热加工应力,上海力学,4(1984). [5] 袁发荣等,《残余应力测试与计算》,湖南大学出版社(1987). -
点击查看大图
计量
- 文章访问数: 1755
- HTML全文浏览量: 61
- PDF下载量: 536
- 被引次数: 0
下载:
