DEPENDENCE OF METAL CUTTING SIMULATIONS ON THE JOHNSON-COOK MODEL THERMAL SOFTENING PARAMETER

机译：金属切削模拟对约翰逊-库克模型热软化参数的依赖性

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Finite element analysis (FEA) has emerged as a powerful tool to simulate and study material removal processes. To ensure the accuracy of analysis, it is important that the constitutive model be accurate. Motivated by results from split Hopkinson pressure bar tests, we explored the impact of changing the thermal softening parameter (m) of the Johnson-Cook material model on finite element analysis of metal cutting. We find the friction coefficient has to be reduced for the cutting forces given by simulations with m = 1.8 to match experimentally determined values, leading to unrealistically low thrust forces. Reducing the friction coefficient reduces the forces by lowering the hydrostatic pressure rather than by changing the shear angle.

机译：有限元分析（FEA）已成为一种强大的工具，可以模拟和研究材料去除过程。为了确保分析的准确性，本构模型的准确性很重要。受霍普金森压力棒试验结果的启发，我们探讨了改变Johnson-Cook材料模型的热软化参数（m）对金属切削有限元分析的影响。我们发现，对于m = 1.8的模拟给出的切削力，必须减小摩擦系数，以匹配实验确定的值，从而导致不切实际的低推力。减小摩擦系数可通过降低静水压力而不是通过改变剪切角来减小力。

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来源
《North American Manufacturing Research Conference; 20060523-26; Milwaukee,WI(US)》|2006年|P.293-300|共8页
会议地点 MilwaukeeWI(US)
作者
A. Deshpande; V. Madhavan; V. Pednekar; A.M. Adibi-Sedeh; R. Ivester;
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作者单位

Department of Industrial and Manufacturing Engineering Wichita State University, Wichita, KS, USA;

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原文格式 PDF
正文语种 eng
中图分类机械制造工艺;
关键词
johnson-cook model; thermal softening parameter; flow stress; hydrostatic pressure;

机译：约翰逊库克模型热软化参数流动应力静水压力;

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1. Modified Johnson-Cook flow stress model with thermal softening damping for finite element modeling of cutting [J] . Laakso Sampsa Vili Antero, Niemi Esko Proceedings of the Institution of Mechanical Engineers, Part B. Journal of engineering manufacture . 2016,第2期

机译：带有热软化阻尼的修正Johnson-Cook流应力模型，用于切削的有限元建模
2. Modeling of Thermally Induced Material Softening in Uncoupled Constitutive Equations for the Application in Metal Cutting Simulations [J] . B. Thimm, J. Steden, A. Glavas Procedia CIRP . 2021,第a期

机译：用于金属切削模拟应用中的热诱导材料软化中的材料软化
3. A Comprehensive Sensitivity Analysis of Johnson-Cook Plasticity Parameters on Orthogonal Cutting Simulations [J] . J. Steden, B. Thimm Procedia CIRP . 2021,第a期

机译：大正交切割模拟的江逊康复塑性参数综合敏感性分析
4. Dependence of Metal Cutting Simulations on the Johnson-Cook Model Thermal Softening Parameter [C] . A. Deshpande, V. Madhavan, V. Pednekar North American Manufacturing Research Conference . 2006

机译：金属切削模拟对约翰逊烹饪模型热软化参数的依赖性
5. A study on the impact of tool-chip contact time on the shear angle in orthogonal machining using constitutive models on metal cutting FEM simulations. [D] . Velamakuri, Naga Sai Chakravarthy. 2016

机译：在金属切削有限元模拟中，使用本构模型研究正交加工中刀具与切屑接触时间对剪切角的影响。
6. RF ablation thermal simulation model: Parameter sensitivity analysis [O] . Xiaoru Wang, Hongjian Gao, Shuicai Wu, -1

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7. Calorimetric consequences of thermal softening in Johnson-Cook's model [O] . Ranc, Nicolas, Chrysochoos, André 2013

机译：Johnson-Cook模型中热软化的量热结果

DEPENDENCE OF METAL CUTTING SIMULATIONS ON THE JOHNSON-COOK MODEL THERMAL SOFTENING PARAMETER

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