预应力切削加工TC4钛合金表面残余应力的有限元模拟
Finite Element Simulation of Residual Stress in Titanium Alloy TC4 Surface Machined by Prestress Cutting
摘 要
采用预应力切削方法对TC4钛合金进行加工, 建立了预应力切削TC4钛合金的有限元模型, 模拟了不同预应力下锯齿状切屑的形成过程及加工表面的残余应力分布情况, 然后将模拟结果与试验结果进行了对比。结果表明: 预应力切削可以调整已加工表面的残余应力分布状态和应力值, 在弹性变形范围内, 预应力越大, 加工后表面的残余压应力越大, 残余压应力的分布也越深; 预应力对锯齿状切屑的形成无明显影响; 模拟结果和试验结果具有较好的一致性。
预应力切削
锯齿状切屑
TC4钛合金
residual stress
prestress cutting
saw-toothed chip
titanium alloy TC4
Abstract
A finite element model ( FEM ) of prestress cutting for titanium alloy TC4 was established to explore the saw-tooth chip forming process and distribution of residual stress to machined surface at different prestresses. Then the simulation value and experimental test value were compared. The results show that the distribution status and value of residual stress on machined surface of titanium alloy can be adjusted by the prestressed cutting method in cutting process, within the elastic deformation limit of titanium alloy, the higher the applied prestress was, the higher the value of compressive residual stress in surface layer was and the deeper the layer of compressive residual stress distribution was. Prestress showed an indistinctive effect on the saw-tooth chip forming process. The numerical simulation values were in good agreement with the experimental values.
中图分类号 TG 506 DOI 10.11973/jxgccl201506021
所属栏目 物理模拟与数值模拟
基金项目
收稿日期 2014/1/13
修改稿日期 2015/4/6
网络出版日期
作者单位点击查看
备注徐建建(1989—), 男, 山东临沂人, 硕士研究生。
引用该论文: XU Jian-jian,GENG Guo-sheng,LI Guo-hong,FENG Jing-jing. Finite Element Simulation of Residual Stress in Titanium Alloy TC4 Surface Machined by Prestress Cutting[J]. Materials for mechancial engineering, 2015, 39(6): 105～110
徐建建,耿国盛,李国红,冯晶晶. 预应力切削加工TC4钛合金表面残余应力的有限元模拟[J]. 机械工程材料, 2015, 39(6): 105～110
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【3】M’SAOUBI R, OUTEIRO J C, CHANGEUX B, et al. Residual stress analysis in orthogonal machining of standard and resulfurized AISI 316L steels[J]. Journal of Materials Processing Technology, 1999, 96(1): 225-233.
【4】JANG D Y, WATKINS T R, KOZACZEK K J, et al. Surface residual stresses in machined austenitic stainless steel[J]. Wear, 1996, 194(1): 168-173.
【5】TSUCHIDA K, KAWADA Y, KODAMA S. A study on the residual stress distributions by turning[J]. Bulletin of JSME, 1975, 116(18): 123-130.
【6】SHIH A J, YANG T Y. Experimental and finite element predictions of residual stresses due to orthogonal metal cutting[J]. International Journal for Numerical Methods in Engineering, 1993, 36: 1487-1507.
【7】胡华南, 周泽华. 预应力加工表面残余应力的理论分析[J].华南理工大学学报, 1994, 22(2): 1-9.
【8】OXLEY P L B.Mechanics of machining—an analytical approach to assessing machinablity [M]. London: Ellis Horwood Limited,1989.
【9】JOHNSON G R, COOK W H. A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures [C]//Proceedings of the 7th International Symposium on Ballistics. Hague, Netherlands: [s.n.], 1983: 541-547.
【10】朱文明. 高速切削Ti6Al4V切屑形成仿真研究[D].南京: 南京航空航天大学, 2007.
【11】彭锐涛, 叶邦彦, 唐新姿, 等. 预应力硬态切削的热力耦合模型及数值模拟[J]. 华南理工大学学报: 自然科学版, 2008, 36(4): 18-22.
【12】郭磊, 吴红兵. 高速切削 TC4 有限元数值模拟研究[J]. 兵器材料科学与工程, 2013, 36(2): 88-92.
【13】李益华, 吴运新, 龚海, 等. 应用X射线衍射法测定轴类工件中的残余应力[J]. 机械工程材料, 2012, 36(7): 96-99.
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