WIT Press

DRM Formulation For Axisymmetric Laser-material Interactions


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WIT Press


R. Gospavić, V. Popov, M. Srecković & G. Todorović


The modeling of laser-material interaction using the boundary element dual reciprocity method (BE-DRM) is presented. Thermal effects in the case of cylindrical geometry for mono as well as multi layer structures were considered. The different aspects of interaction up to the melting point of considered materials are presented. The effect of temperature dependence of the absorption coefficients on the process of laser heating was considered. The BEM formulation is based on the fundamental solution for the Laplace equation. The numerical results for spatial as well as temporal temperature distribution inside the material bulk are presented. Two cases were considered: a mono-layer and a multi layer case. In the case of a mono-layer structure DRM and DRM-MD approaches were used, and the numerical results were compared with the analytical ones. In the multi layer case only the DRM-MD approach was used. Keywords: axisymmetric laser-material interaction, dual reciprocity method. 1 Introduction The dual reciprocity method (DRM) was applied for laser-material interaction analysis. Laser beams have a number of applications in different areas of science, technology, and medicine. In the present work, thermal models of interaction in case of cylindrical geometry and mono as well as multi layer structures were considered. The spatial and temporal distributions of temperature field were considered. The numerical model of laser-material interaction described here is restricted only to heating effects of the targeted material without destructive and


axisymmetric laser-material interaction, dual reciprocity method.