Abstract
The paper presents an analytical study for comparing different numerical methods used for the modeling of cutting process using finite element method. The aims of this study is to compare capabilities of FE software package (Deform, AdvantEdge, ANSYS Workbench and ABAQUS). The main stages of modeling are discussed, as well as well-known methods and approaches used for their implementation. Main formulations for description of motion of deformable materials are analyzed to Lagrangian approach, Eulerian approach, Arbitrary Lagrangian Eulerian (ALE) approach. Numerical techniques to model chip separation are grouped as geometrical and physical. In this paper two strategies for time integration, implicit and explicit schemes are reviewed. Various models of friction between the chip and the tool are discussed: Amonton-Coulomb's Law, Prandtl's Law and Zorev. In this work, modeling and simulation of cutting process is carried out by FEM software ABAQUS. As a result of modeling, the stress and strain fields for both the workpiece and the tool are presented, as well as the thermal field of the workpiece and the chip. The numerical results obtained are compared with the results have been carried out previously using software ANSYS Workbench. The numerical values of temperatures, stresses and deformations correspond to traditional concepts of the cutting process, as well as experimental data presented in open sources.
Highlights
The paper presents an analytical study for comparing different numerical methods used for the modeling of cutting process using finite element method
The main stages of modeling are discussed, as well as well-known methods and approaches used for their implementation
Main formulations for description of motion of deformable materials are analyzed to Lagrangian approach, Eulerian approach, Arbitrary Lagrangian Eulerian (ALE) approach
Summary
Модель Кулона–Амонтона является первой и наиболее простой моделью, предложенной для описания процесса трения при резании:. Для уточнения особенностей процесса трения при резании Зоревым предложена более реалистичная модель. Зона прилипания расположена вблизи режущей кромки инструмента и характеризуется большими значениями нормальных напряжений, поэтому напряжение трения принято равным пределу текучести на сдвиг обрабатываемого материала τy. Предполагается, что напряжение трения пропорционально напряжению текучести на сдвиг обрабатываемого материала τf = mτY, где τY – предел текучести на сдвиг, а m - коэффициент трения. Usui и Shirakashi разработали модель трения, Представленные выше этапы и особенности используя нелинейное уравнение для выражения моделирования процесса резания могут быть ресостоянии напряжения в зоне прилипания и ализованы как в специализированных програмскольжения: мах, таких как Deform и Advantedge, так и в универсальных, таких как Abaqus, Ansys Workbench, τ = τ 1 − exp −.
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