A full 3-D transient model is developed for the ablation phenomena and thermal stress evolution during laser cutting and/or drilling of ceramic plates. The computational methodology is based on the Galerkin finite element method along with the use of a fixed grid algorithm to treat the thermal ablation resulting from an applied laser source. The present model is able to model any complex ablation operations involving discontinuity in geometries, as encountered in laser cutting and laser drilling operations. This is an advantage over the front tracking method by which the ablation moving interface is precisely tracked in time and which is useful for simple geometries. The laser ablation model is coupled with a thermal stress model to predict the evolution of thermal stresses, which arise due to a rapid change in thermal gradient near the laser beams. Model predictions compare well with the available data in literature for a simple configuration. Results obtained from model for both dual pulsed laser cutting and single laser drilling are discussed.
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ASME 2003 Heat Transfer Summer Conference
July 21–23, 2003
Las Vegas, Nevada, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-3695-9
PROCEEDINGS PAPER
A 3-D Numerical Model for Ablation Phenomena and Thermal Stress Evolution During Laser Machining Available to Purchase
R. Akarapu,
R. Akarapu
Washington State University, Pullman, WA
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B. Q. Li,
B. Q. Li
Washington State University, Pullman, WA
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A. E. Segall
A. E. Segall
Pennsylvania State University, University Park, PA
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R. Akarapu
Washington State University, Pullman, WA
B. Q. Li
Washington State University, Pullman, WA
A. E. Segall
Pennsylvania State University, University Park, PA
Paper No:
HT2003-47298, pp. 189-198; 10 pages
Published Online:
December 17, 2008
Citation
Akarapu, R, Li, BQ, & Segall, AE. "A 3-D Numerical Model for Ablation Phenomena and Thermal Stress Evolution During Laser Machining." Proceedings of the ASME 2003 Heat Transfer Summer Conference. Heat Transfer: Volume 3. Las Vegas, Nevada, USA. July 21–23, 2003. pp. 189-198. ASME. https://doi.org/10.1115/HT2003-47298
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