Full-through laser cutting process simulation

M. S. Groß, I. Black, W. H. Müller

Research output: Contribution to journalArticlepeer-review

Abstract

This paper describes the implementation and numerical evaluation of a transient three-dimensional computer simulation of the CO2 laser cutting process. Utilising Crank-Nicolsen-Finite-Difference equations for the solution of the Fourier heat transfer equation with Newtonian convection, the temperature distribution is predicted. For high accuracy the mesh is of non-equidistant nature, following a Weibull Distribution for the grid spacing. A parallel computation solver is used, based on Divide-and-Conquer Gaussian elimination for banded matrices (ScaLAPACK), to calculate the nodal temperatures using a cluster of two HP J5000 workstations. Included in the solution is the behaviour of the material during phase change, whilst the open structure of the developed software allows incorporation of effects such as surface oxidation, radiation and limited convective flow. The main area of interest is the cutting capability with respect to varying material thickness (e.g. tailored blanks), cutting speed, power of the laser, laser mode, focal spot diameter and material properties, as well as the effect of these parameters on the quality of the cut.

Original languageEnglish
Pages (from-to)236-239
Number of pages4
JournalProceedings of SPIE - the International Society for Optical Engineering
Volume4424
DOIs
Publication statusPublished - 2001
EventECLIM 2000: 26th European Conference on Laser Interaction with Matter - Prague, Czech Republic
Duration: 12 Jun 200016 Jun 2000

Keywords

  • Finite difference methods
  • Laser cutting
  • Parallel computation

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