预应力切削钛合金的有限元分析

彭锐涛; 伍佳易; 唐新姿; 谭援强; 刘雄伟

预应力切削钛合金的有限元分析

1.
湘潭大学机械工程学院复杂轨迹加工工艺及装备教育部工程研究中心,湘潭 411105;
2.
中央兰开夏大学计算工程科学学院,英国 PR12HE

基金项目:

国家自然科学基金项目(51005194)

湖南省自然科学基金委员会与株洲市政府自然科学联合基金重点项目(13JJ8007)

湖南省教育厅项目(10C1258)资助

详细信息

作者简介:
彭锐涛(1982－),副教授,博士,硕士生导师,研究方向为先进制造技术与风力发电技术,pengruitao@xtu．edu．cn

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- 文章访问数: 185
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- 被引次数: 0
出版历程
- 收稿日期: 2012-05-09
- 刊出日期: 2015-06-10

Finite Element Analysis of Prestressed Cutting of Titanium Alloy

1.
Engineering Research Center of Complex Track Processing Technology and Equipment of Ministry of Education at School of Mechanical Engineering,Xiangtan University,Xiangtan 411105;
2.
School of Computing,Engineering and Science,University of Central Lancashire,UK PR12HE

摘要

摘要: 为揭示预应力切削对钛合金Ti6Al4V加工表面残余应力的调整机理,探讨切削时锯齿形切屑的形成过程,基于预应力切削原理建立了钛合金的预应力切削有限元模型,模拟了0、280 MPa和560 MPa这3种预应力下的锯齿形切屑形成过程以及已加工表面的残余应力分布。结果表明:采用预应力切削方法可以调整钛合金已加工表面的残余应力状态;预应力对锯齿形切屑的形成过程和切屑特征无明显影响;在材料弹性极限内施加越大的预应力,表面层残余压应力效果越显著,次表层最大残余压应力值越高,残余压应力层分布也越深。
- 预应力切削 /
- 钛合金 /
- 有限元分析 /
- 残余应力 /
- 锯齿形切屑
Abstract: In order to reveal the adjustment principle of prestressed cutting of the residual stress of titanium alloy Ti6Al4V,and to explore the serrated chip forming process in cutting, a finite element model of prestressed cutting of titanium alloy was established based on the principle of prestressed cutting. The serrated chip forming process and distribution of residual stress to machined surface were simulated at the prestresses of 0, 280 MPa and 560 MPa. The simulation results indicate that the status of residual stress on machined surface of titanium alloy can be adjusted in the cutting process by utilizing the prestressed cutting method. Prestress shows an indistinctive effect on the serrated chip forming process and characteristic. Within the elastic limit of titanium alloy, the higher the applied prestress is, the more prominent the compressive residual stress in surface layer is,and the higher the magnitude of compressive residual stress in subsurface layer is,the deeper the layer of compressive residual stress distribution is.
- titanium alloys /
- finite element method /
- mathematical models /
- residual stresses /
- prestressed cutting

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参考文献(11)

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