LAMPL RESEARCH OF LAM
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Achievements in LAM of Structural Ceramics
Silicon Nitride
Silicon Nitride
Zirconia Ceramics
Partially Stabilized Zirconia
Mullite
Mullite
Laser-Assisted Machining Research
Objectives:

An ultimate objective is to provide a complete physical understanding of the LAM process (applied to various materials) and the development of a complete thermo-mechanical model which will enable its commercial application to machine ceramic parts to precise specifications. Specific objectives of the research include:

  • Determine the [LAM] machinability of silicon nitride, zirconia and mullite.
  • Find operating conditions which globally optimizes the process, taking into account the desire to:
    • maximize material removal rate
    • minimize sub-surface flaws
    • minimize surface roughness
    • minimize tool wear
  • Determine the material removal mechanism for various workpiece materials.
  • Determine the tool wear mechanism and tool wear rate for representative LAM conditions.
  • Develop material constitutive models for structural ceramics (under investigation) for stress, strain and strain rates representative of LAM.
  • Develop transient, three-dimensional model of the workpiece undergoing LAM, including internal radiation for semi-transparent materials.
  • Understand the underlying physics of LAM.
  • Develop guidelines to determine materials for which LAM is best suited.
  • Develop an economic analysis to determine conditions for which LAM is a feasible alternative to grinding.

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Research Plan:

The study of laser-assisted machining at Purdue is based on the simultaneous experimental and numerical investigation of the process. The experiments and modeling share a symbiotic relationship, as certain parts of one relies on results from the other (Schematic). This allows the underlying physics to be determined while increasing the machining knowledge-base.

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Numerical Modeling
3D Temperature Field
LAM Experiments
LAM of Silicon Nitride
SPONSORS

National Science Foundation
Purdue Research Foundation
Cummins Engine Company
Schlumberger
Indiana 21st Century Research and Technology

 

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Purdue Seal MECHANICAL ENGINEERING
PURDUE UNIVERSITY

Last revised on January 21, 2001 by Frank Pfefferkorn

Copyright 2001 Dr. Y.C. Shin
Any unauthorized use, copying or mirroring strictly prohibited