Deformations and stresses induced in materials by moving beam of CO2 laser

Zygmunt Mucha

doi:10.1117/12.726557

23 January 2007 Deformations and stresses induced in materials by moving beam of CO₂ laser

Zygmunt Mucha

Proceedings Volume 6598, Laser Technology VIII: Applications of Lasers; 65980M (2007) https://doi.org/10.1117/12.726557
Event: Laser Technology VIII, 2006, Szczecin, Poland

Abstract

Analytical modelling of thermal bending of plates by use of a laser beam with circular cross-section is presented. The most important parameters in this process have been found: the pick surface temperature and the Fourier number, which are the similarity numbers. Experimental verification was performed. Temperature distribution in the plastified layer of the material (where the material losses its elastic properties) was taken into considerations. Developed model proves that effective bending occurs when the material surface temperature is close to the melting temperature. Restrain rigidity coefficient of heated material in Presented model can be applied in various laser processing technologies, for instance in welding, cutting, surface treatment, including hardening and others. Theoretical results of residual stresses distribution in plates after laser beam pass is presented. Analysis of the solution proves possibility control of surface stress on both sides of the bent plates by change Fourier number and surface temperature.

Citation Download Citation

Zygmunt Mucha "Deformations and stresses induced in materials by moving beam of CO₂ laser", Proc. SPIE 6598, Laser Technology VIII: Applications of Lasers, 65980M (23 January 2007); https://doi.org/10.1117/12.726557

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