Simulation of Chip Segmentation in Metal Cutting Using ALE Finite Element Method

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شبیه سازی شکست براده در فرایند تراشکاری به کمک روش اجزای محدود ALE

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 43313 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Movahhedy, Mohammad Reza
Abstract:
Since it is important to obtain the suitable cutting conditions for machining and investigate the effect of various parameters on this process, the simulation of this process has been developed extensively by using the finite element method in recent years. Due to very large plastic deformation and also continuous chip flow, one of the most appropriate techniques in modeling chip formation is the arbitrary Lagrangian-Eulerian (ALE) finite element method which has been used in several papers using some traditional codes like ABAQUS or personal codes in recent years. However, one of the limitations in this method is the use of a continuous mesh retains with no change in connectivities which is not proper to model some phenomena such as chip segmentation. In this study, based on the ALE finite element code developed previously for machining simulation, an approach has been developed to model chip segmentation by using an appropriate fracture theory.
Keywords:
Cutting ; Metals Cutting ; Arbitrary Lagrangian-Eulerian Method ; Finite Element Method ; Chip Segmentation