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首页> 外文期刊>Journal of machining and forming technologies >INFLUENCE OF THE JOHNSON COOK MATERIAL MODEL PARAMETERS AND FRICTION MODELS ON SIMULATION OF ORTHOGONAL CUTTING PROCESS
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INFLUENCE OF THE JOHNSON COOK MATERIAL MODEL PARAMETERS AND FRICTION MODELS ON SIMULATION OF ORTHOGONAL CUTTING PROCESS

机译：约翰逊库克材料模型参数和摩擦模型对正交切削过程模拟的影响

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摘要

In the recent past, Finite Element (FE) modeling has emerged as one of the most effective tools that could substitute the conventional time consuming and expensive experimental tests to a great extent. This work deals with FE model-based analysis of the two critical factors during orthogonal cutting, namely the flow stress characterization of work material and the frictional boundary conditions at the tool-chip interface. We exploit the new set of Johnson-Cook constants reported recently along with two other sets of data that are commonly used in finite element modeling for orthogonal cutting of AISI 4340 steel. The new set of Johnson-Cook material data has not been used yet in any reported work on the orthogonal cutting process simulation. Besides, a comparative study has been made by considering seven most relevant friction models among various models proposed by researchers, including a relatively newer one. Though few works are already available related to friction modeling, the uniqueness of the presented results lies in the consideration of several friction models where friction coefficients are functions of temperature, stress and sliding velocity, etc. Results show that the cutting conditions are the critical parameters which decide the type of friction encountered in the chip formation process and, therefore, the friction model has to be selected based on the cutting conditions for best results.
机译：在最近的过去，有限元（FE）建模已成为最有效的工具之一，可以在很大程度上替代传统的耗时且昂贵的实验测试。这项工作涉及在正交切削过程中两个关键因素的基于有限元模型的分析，即工作材料的流应力表征和刀具-切屑界面的摩擦边界条件。我们利用最近报告的新的Johnson-Cook常数集以及常用于AISI 4340钢正交切削的有限元建模中的另外两组数据。新的Johnson-Cook材料数据集尚未用于任何有关正交切削过程模拟的报告工作中。此外，通过考虑研究人员提出的各种模型中的七个最相关的摩擦模型（包括一个相对较新的模型），进行了比较研究。尽管很少有与摩擦模型有关的工作，但所提出结果的唯一性在于考虑了几种摩擦模型，其中摩擦系数是温度，应力和滑动速度等的函数。结果表明切削条件是关键参数这决定了切屑形成过程中遇到的摩擦类型，因此，必须根据切削条件选择摩擦模型以获得最佳结果。

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