Numerical simulation of consumable-rod’s thermal-mechanical behavior in friction surfacing
-
摘要: 采用刚粘塑性材料模型,借助有限元软件对摩擦堆焊过程耗材三维温度场与变形场进行了耦合计算,分析了耗材的温度变化及变形情况,讨论了影响温度变化的因素,并用热电偶测量了耗材的温度变化情况.模拟结果显示,耗材摩擦界面处温度的升高先急后缓,待系统进入准稳态,摩擦界面上温度也基本恒定,耗材端部存在一定温度梯度.耗材端部摩擦界面处最先进入热塑性状态并发生变形.模拟结果与试验结果吻合良好,再现了摩擦堆焊过程中耗材的温度变化及变形.模拟结果可为摩擦堆焊机理研究及确定关键工艺参数提供理论指导.Abstract: By finite element method and rigid-viscoplastic model, the coupling of 3-D temperature field and deformation field of consumable-rod during friction surfacing process was simulated. Temperature change and deformation of consumable-rod were analyzed. The factors influencing temperatures were discussed. Temperature change of consumable-rod was measured by thermocouple. It was showed in the simulation results that the temperature increase rate at friction interface was higher at first, then became lower. Once the friction system became quasi-steady, the temperature here would be stable approximately. Special temperature gradient was found at consumable-rod’s bottom end. The friction interface firstly became viscoplastic and then deformed. The largest effective strain existed near the center of the bottom of the circle. The simulation results are consistent with experiments, reappearing temperature change and deformation of consumable-rod during friction surfacing. The results can be helpful in the study of process mechanism and supplying the theoretical guide to choose key technical parameters in engineering practice.
-
Key words:
- consumable-rod /
- friction surfacing /
- temperature field /
- numerical simulation
-
[1] Fukakusa K. Real rotational contact plane in friction welding of different diameter material and dissimilar materials:fundamental study of friction welding [J] Welding International,1997,11(6):425~431 [2] Hasegawa M, Ieda T. Effects of friction welding conditions on initial joining phenomena [J] Welding International,1999,13(9):701~711 [3] Nicholas E D, Thomas W M. Metal deposition by friction welding [J] Welding Journal,1986, 8:17~27 [4] Shinoda T. Deposition of hard surfacing layer by friction surfacing. Welding International, 1996,10(4):288~294 [5] 姚君山.耗材摩擦焊工艺物理过程研究. 北京:北京航空航天大学机械工程及自动化学院,2001 Yao Junshan. A study on the physical process of consumable-rod friction welding. Beijing:School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics,2001(in Chinese) [6] 傅 莉,杜随更. 摩擦焊接过程数值模拟技术研究进展[J] 接学报,2001,22(5):87~92 Fu Li, Du Suigeng. Advance of research on the numerical simulation of friction welding process [J] ransaction of the China Welding Institution,2001,22(5):87~92(in Chinese) [7] Allcock, Andy. Surface technology joins weld research [J] Machinery and Production Engineering, 1992, 150 (1):24~26 [8] 李付国,聂 蕾,李庆华,等.GH4169合金惯性摩擦焊接过程组织计算与预测. 焊接学报,2002,1:30~33 Li Fuguo, Nie Lei, Li Qinghua, et al. Microstructure simulation and prediction of IN-718 super alloy in inertial friction welding[J] Transaction of the China Welding Institution,2002,1:30~33(in Chinese) [9] 杜随更,傅 莉,刘小文.摩擦焊接过程的热力耦合有限元分析[J] 械工程学报,2002,38(6):77~82 Du Suigeng, Fu Li, Liu Xiaowen. Fea coupled with thermo-mechanical effect on friction welding [J] hinese Journal of Mechanical Engineering, 2002,38(6):77~82(in Chinese) -
点击查看大图
计量
- 文章访问数: 2869
- HTML全文浏览量: 174
- PDF下载量: 969
- 被引次数: 0
下载:
