### Abstract

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.

Original language | English (US) |
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Title of host publication | Proceedings of the 2003 ASME Summer Heat Transfer Conference, Volume 3 |

Pages | 189-198 |

Number of pages | 10 |

State | Published - Dec 1 2003 |

Event | 2003 ASME Summer Heat Transfer Conference (HT2003) - Las Vegas, NV, United States Duration: Jul 21 2003 → Jul 23 2003 |

### Publication series

Name | Proceedings of the ASME Summer Heat Transfer Conference |
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Volume | 2003 |

### Other

Other | 2003 ASME Summer Heat Transfer Conference (HT2003) |
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Country | United States |

City | Las Vegas, NV |

Period | 7/21/03 → 7/23/03 |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Engineering(all)

### Cite this

*Proceedings of the 2003 ASME Summer Heat Transfer Conference, Volume 3*(pp. 189-198). (Proceedings of the ASME Summer Heat Transfer Conference; Vol. 2003).

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*Proceedings of the 2003 ASME Summer Heat Transfer Conference, Volume 3.*Proceedings of the ASME Summer Heat Transfer Conference, vol. 2003, pp. 189-198, 2003 ASME Summer Heat Transfer Conference (HT2003), Las Vegas, NV, United States, 7/21/03.

**A 3-D numerical model for ablation phenomena and thermal stress evolution during laser machining.** / Akarapu, R.; Li, B. Q.; Segall, A. E.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - A 3-D numerical model for ablation phenomena and thermal stress evolution during laser machining

AU - Akarapu, R.

AU - Li, B. Q.

AU - Segall, A. E.

PY - 2003/12/1

Y1 - 2003/12/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=1842690983&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1842690983&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:1842690983

SN - 0791836959

SN - 9780791836958

T3 - Proceedings of the ASME Summer Heat Transfer Conference

SP - 189

EP - 198

BT - Proceedings of the 2003 ASME Summer Heat Transfer Conference, Volume 3

ER -