Finite element modeling of ablation phenomena and thermal stress evolution during a unique application of dual laser cutting of ceramics

R. Akarapu, B. Q. Li, Albert Eliot Segall

Research output: Contribution to conferencePaper

6 Citations (Scopus)

Abstract

A 3-D numerical model is developed for the ablation phenomena and thermal stress evolution during single and dual laser cutting of alumina. The numerical model development is based on the finite element solution of thermal conduction with a fixed grid method used to treat the thermal ablation resulting from an applied laser source. Compared with the front tracking method by which the ablation moving interface is precisely tracked in time and which is useful for simple geometries, the present method has an advantage of modeling any complex ablation geometries such as those induced by a dual laser power source. The thermal model is integrated with a stress model to predict the evolution of thermal stresses, which are developed during laser cutting as a result of strong temperature gradient near the laser source. Model predictions are checked against the available data in literature for a simple configuration. Results show that groove shapes, temperature and stress distributions are similar right in front of the cutting laser for both single and dual lasers operating in a pulse mode, but they differ in the region when the lead laser becomes effective.

Original languageEnglish (US)
Pages87-98
Number of pages12
StatePublished - Jul 21 2003
EventProceedings of the Technical Sessions presented by the Materials Processing and Manufacturing Division of TMS - San Diego, CA, United States
Duration: Mar 2 2003Mar 6 2003

Other

OtherProceedings of the Technical Sessions presented by the Materials Processing and Manufacturing Division of TMS
CountryUnited States
CitySan Diego, CA
Period3/2/033/6/03

Fingerprint

laser cutting
thermal stresses
Ablation
Thermal stress
ablation
ceramics
Lasers
lasers
Numerical models
geometry
grooves
stress distribution
temperature gradients
temperature distribution
aluminum oxides
grids
Geometry
Aluminum Oxide
conduction
Laser modes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Akarapu, R., Li, B. Q., & Segall, A. E. (2003). Finite element modeling of ablation phenomena and thermal stress evolution during a unique application of dual laser cutting of ceramics. 87-98. Paper presented at Proceedings of the Technical Sessions presented by the Materials Processing and Manufacturing Division of TMS, San Diego, CA, United States.
Akarapu, R. ; Li, B. Q. ; Segall, Albert Eliot. / Finite element modeling of ablation phenomena and thermal stress evolution during a unique application of dual laser cutting of ceramics. Paper presented at Proceedings of the Technical Sessions presented by the Materials Processing and Manufacturing Division of TMS, San Diego, CA, United States.12 p.
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abstract = "A 3-D numerical model is developed for the ablation phenomena and thermal stress evolution during single and dual laser cutting of alumina. The numerical model development is based on the finite element solution of thermal conduction with a fixed grid method used to treat the thermal ablation resulting from an applied laser source. Compared with the front tracking method by which the ablation moving interface is precisely tracked in time and which is useful for simple geometries, the present method has an advantage of modeling any complex ablation geometries such as those induced by a dual laser power source. The thermal model is integrated with a stress model to predict the evolution of thermal stresses, which are developed during laser cutting as a result of strong temperature gradient near the laser source. Model predictions are checked against the available data in literature for a simple configuration. Results show that groove shapes, temperature and stress distributions are similar right in front of the cutting laser for both single and dual lasers operating in a pulse mode, but they differ in the region when the lead laser becomes effective.",
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Akarapu, R, Li, BQ & Segall, AE 2003, 'Finite element modeling of ablation phenomena and thermal stress evolution during a unique application of dual laser cutting of ceramics', Paper presented at Proceedings of the Technical Sessions presented by the Materials Processing and Manufacturing Division of TMS, San Diego, CA, United States, 3/2/03 - 3/6/03 pp. 87-98.

Finite element modeling of ablation phenomena and thermal stress evolution during a unique application of dual laser cutting of ceramics. / Akarapu, R.; Li, B. Q.; Segall, Albert Eliot.

2003. 87-98 Paper presented at Proceedings of the Technical Sessions presented by the Materials Processing and Manufacturing Division of TMS, San Diego, CA, United States.

Research output: Contribution to conferencePaper

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N2 - A 3-D numerical model is developed for the ablation phenomena and thermal stress evolution during single and dual laser cutting of alumina. The numerical model development is based on the finite element solution of thermal conduction with a fixed grid method used to treat the thermal ablation resulting from an applied laser source. Compared with the front tracking method by which the ablation moving interface is precisely tracked in time and which is useful for simple geometries, the present method has an advantage of modeling any complex ablation geometries such as those induced by a dual laser power source. The thermal model is integrated with a stress model to predict the evolution of thermal stresses, which are developed during laser cutting as a result of strong temperature gradient near the laser source. Model predictions are checked against the available data in literature for a simple configuration. Results show that groove shapes, temperature and stress distributions are similar right in front of the cutting laser for both single and dual lasers operating in a pulse mode, but they differ in the region when the lead laser becomes effective.

AB - A 3-D numerical model is developed for the ablation phenomena and thermal stress evolution during single and dual laser cutting of alumina. The numerical model development is based on the finite element solution of thermal conduction with a fixed grid method used to treat the thermal ablation resulting from an applied laser source. Compared with the front tracking method by which the ablation moving interface is precisely tracked in time and which is useful for simple geometries, the present method has an advantage of modeling any complex ablation geometries such as those induced by a dual laser power source. The thermal model is integrated with a stress model to predict the evolution of thermal stresses, which are developed during laser cutting as a result of strong temperature gradient near the laser source. Model predictions are checked against the available data in literature for a simple configuration. Results show that groove shapes, temperature and stress distributions are similar right in front of the cutting laser for both single and dual lasers operating in a pulse mode, but they differ in the region when the lead laser becomes effective.

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Akarapu R, Li BQ, Segall AE. Finite element modeling of ablation phenomena and thermal stress evolution during a unique application of dual laser cutting of ceramics. 2003. Paper presented at Proceedings of the Technical Sessions presented by the Materials Processing and Manufacturing Division of TMS, San Diego, CA, United States.