Fundamentals of cutting
Fundamentals of cutting
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DOI：
10.1098/rsfs.2015.0108
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发表时间：
2016-06
期刊：
影响因子：
4.4
通讯作者：
James G. Williams;James G. Williams;Yatish Patel
中科院分区：
文献类型：
--
作者：
James G. Williams;James G. Williams;Yatish Patel
用断裂力学术语分析切割过程，以量化所涉及的各种参数。所使用的模型是用楔子去除一层材料或切屑的正交切削模型。切屑的行为由其厚度决定，对于大曲率半径，切屑具有弹性并且可以进行平滑的切削。对于较小的厚度，有一个过渡，首先是塑性弯曲，然后是塑性剪切，以形成较小的厚度并形成光滑的切屑。控制参数是刀具几何形状（主要是楔角）以及弹性模量、屈服应力和断裂韧性等材料特性。摩擦力也很重要。事实证明，切割过程可以通过这些参数进行量化，这对于生物学切割的研究可能很有用。
The process of cutting is analysed in fracture mechanics terms with a view to quantifying the various parameters involved. The model used is that of orthogonal cutting with a wedge removing a layer of material or chip. The behaviour of the chip is governed by its thickness and for large radii of curvature the chip is elastic and smooth cutting occurs. For smaller thicknesses, there is a transition, first to plastic bending and then to plastic shear for small thicknesses and smooth chips are formed. The governing parameters are tool geometry, which is principally the wedge angle, and the material properties of elastic modulus, yield stress and fracture toughness. Friction can also be important. It is demonstrated that the cutting process may be quantified via these parameters, which could be useful in the study of cutting in biology.