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Migrating From 3D Modelling of the Laser Assisted Machining Process into a Valid 2D Model

Mousavi, Mohammad Amin | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47995 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Movahhedy, Mohammad Reza
  7. Abstract:
  8. Due to recent advances in laser technology and instruments, laser assisted machining processes has gained extra attention by scientists and industries. Naturally, effective modeling of the process is of great interest for researchers. Machining processes are generally modeled via FE tools and based on the requirements of model, it can be performed either mechanically or thermos-mechanically. About the LAM problems, it is basically meaningless to have a model without considering thermal effects. Hence, modeling is performed in two steps where through the first one, a thermal problem is solved to bring the temperature distribution of the work piece as the initial conditions of the next step. Then, during the second step, cutting process in simulated. The important point to note is that machining is usually studied using planer models while it is much better to consider a 3D model for the thermal stage. Hence, it is required to reduce and adopt the 3D thermal modelling of the process into a 2D model. In previous studies, this job has been done with negligence and through some sort of approximations. In this study, a systematic approach is used to find an appropriate mapping of the 3D problem criteria on the 2D simulation. Besides developing the procedure, a set of simulations is performed to find numerical results for a predefined range of parameters. Each 3D model is accompanied with the 2D counterpart and proper correction factors are extracted
  9. Keywords:
  10. Laser Assisted Machining ; Finite Element Method ; Temperature Field ; Two Dimentional Simulation ; Three-Dimensional Simulation ; Laser Assisted Machining

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