Subsurface deformation generated by orthogonal cutting: analytical modelling and experimental verification
Subsurface deformation generated by orthogonal cutting: analytical modelling and experimental verification
复制标题
正交切削产生的次表面变形：分析建模和实验验证
DOI：
10.1115/1.4036994
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发表时间：
2017-09
期刊：
影响因子：
--
通讯作者：
Han Ding
中科院分区：
文献类型：
--
作者：
Dong Zhang;Xiao-Ming Zhang;Juergen Leopold;Han Ding
切削过程中的亚表层变形与亚表层硬化、组织变化、晶粒细化、白色层形成等密切相关，因而引起了人们的广泛关注。为了预测已加工零件的亚表面变形，本文提出了一种分析模型。将奥克斯利的预测模型与方的滑移线场相结合，预测了第一、第三剪切带对工件的机械载荷和热载荷。分别基于接触力学和移动热源理论计算了应力场和温度场。然而，由材料屈服引起的弹塑性区域阻碍了从应力场和工作材料本构模型直接导出亚表面塑性变形。为了解决这个问题，弹性应变增量的混合函数推导出塑性应变。此外，一个复杂的材料本构模型，考虑应变硬化，应变率敏感性，和热软化效应的工作材料被纳入这个分析模型。为了验证该模型，在AISI 52100钢正交切削过程中的亚表面变形的有限元模拟进行。通过一种基于数字图像相关（DIC）技术的地下变形测量新技术对地下变形进行了实验验证。为了证明亚表面变形预测的应用，加工部件的亚表面显微硬度进行实验测试，并与基于所提出的方法的预测值进行比较。
Subsurface deformation of the cutting process has attracted a great deal of attention due to its tight relationship with subsurface hardening, microstructure alteration, grain refinement, and white layer formation. To predict the subsurface deformation of the machined components, an analytical model is proposed in this paper. The mechanical and thermal loads exerted on the workpiece by the primary and tertiary shear zones are predicted by a combination of Oxley's predictive model and Fang's slip line field. The stress field and temperature field are calculated based on contact mechanics and the moving heat source theory, respectively. However, the elastic–plastic regime induced by the material yielding hinders the direct derivation of subsurface plastic deformation from the stress field and the work material constitutive model. To tackle this problem, a blending function of the increment of elastic strain is developed to derive the plastic strain. In addition, a sophisticated material constitutive model considering strain hardening, strain rate sensitivity, and thermal softening effects of work material is incorporated into this analytical model. To validate this model, finite element simulations of the subsurface deformation during orthogonal cutting of AISI 52100 steel are conducted. Experimental verification of the subsurface deformation is carried out through a novel subsurface deformation measurement technique based on digital image correlation (DIC) technique. To demonstrate applications of the subsurface deformation prediction, the subsurface microhardness of the machined component is experimentally tested and compared against the predicted values based on the proposed method.
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影响因子：
3.1
作者：
S. Shen;S. Atluri
通讯作者：
S. Shen;S. Atluri
影响因子：
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作者：
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DOI：
10.1115/1.2830208
发表时间：
1997-11
期刊：
Manufacturing Science and Engineering: Volume 2
影响因子：
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作者：
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通讯作者：
D. Waldorf;R. DeVor;S. Kapoor
DOI：
10.1115/1.4027207
发表时间：
2014-08-01
影响因子：
4
作者：
Ding, Hongtao;Shin, Yung C.
通讯作者：
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DOI：
10.1115/1.4034279
发表时间：
2017-06
影响因子：
4
作者：
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