Finite element investigation of the flow stress dependence of chip formation
Finite element investigation of the flow stress dependence of chip formation
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DOI：
10.1016/j.jmatprotec.2004.09.076
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发表时间：
2005-08-25
影响因子：
6.3
通讯作者：
Bäker, M
中科院分区：
文献类型：
--
作者：
Bäker, M
二维正交高速切削过程的有限元模型用于执行具有应变硬化、热软化和速率相关硬化的通用流动应力定律的参数变化。讨论了材料参数对切削力和切屑形成过程的影响。结果表明，切屑分割的强度可以通过绝热流应力曲线定性地理解，曲线的最大值决定分割的开始，随后流变应力的下降决定其强度。结果用于研究分割过程的各个阶段。还与实验结果进行了定性比较。 (c) 2004 Elsevier B.V. 保留所有权利。
A finite element model of a two-dimensional orthogonal high-speed cutting process is used to perform parameter variations of a generic flow stress law with strain hardening, thermal softening, and rate-dependent hardening. The influence of the material parameters on cutting forces and on the chip formation process is discussed. It is shown that the strength of chip segmentation can be understood qualitatively by adiabatic flow stress curves, with the maximum of the curve determining the onset of segmentation and the subsequent decrease in the flow stress determining its strength. The results are used to study the stages of the segmentation process. A qualitative comparison with experimental results is also performed. (c) 2004 Elsevier B.V. All rights reserved.