# Design for reliability methodology for micro laser welding of pigtail fibres

Mallik, A., Stoyanov, S., Bailey, C. and Firth, P.
(2009)
*Design for reliability methodology for micro laser welding of pigtail fibres.*
In: Thermal, Mechanical and Multi-Physics simulation and Experiments in Microelectronics and Microsystems.
Institute of Electrical and Electronics Engineers, Inc., Piscataway, NJ, USA, pp. 1-7.
ISBN 978-1-4244-4161-7 (electronic), 978-1-4244-4160-0 (print)
(doi:10.1109/ESIME.2009.4938409)

## Abstract

This paper discusses the effect of five process parameters on the generation of post weld stresses in the pigtail fibre optic. The alignment of the fibre optic and the laser in the butterfly module become misaligned during the laser welding process of the sleeve to the ferrule. This is primarily due to post welding stresses in the fibre optic which develop during the cooling process. The mechanical stresses resulting in the post welded fibre optic are estimated using Finite Element Analysis and response surface methodology. Integrated Design of Experiments (DoE) and Finite Element Analysis (FEA) are used to determine the distribution of the post welding stresses in the fibre optic. The DoE data is used to construct an explicit reduced order model to perform a sensitivity analysis. The influence of the manufacturing tolerances and variation of the design variables on the residual stresses in fibre is assessed using a Monte Carlo simulation. The initial design of the fibre optic is used to evaluate the important process parameters and to assess the capability of the welding process. A particle swarm optimisation algorithm is used to undertake design optimisation of fibre optic and to determine the optimal process conditions.

Item Type: | Conference Proceedings |
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Title of Proceedings: | Thermal, Mechanical and Multi-Physics simulation and Experiments in Microelectronics and Microsystems |

Additional Information: | Paper in Proceedings of the 10th International Conference on Thermal, Mechanical and Multi-Physics simulation and Experiments in Microelectronics and Microsystems, 2009. EuroSimE, on 26-29 April 2009 in Delft. |

Uncontrolled Keywords: | five process parameters, post weld stresses, pigtail fibre optic, butterfly module, response surface methodology, Integrated Design of Experiments (DoE), Finite Element Analysis (FEA), Monte Carlo simulation, particle swarm optimisation algorithm |

Subjects: | T Technology > T Technology (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |

School / Department / Research Groups: | School of Computing & Mathematical Sciences Faculty of Architecture, Computing & Humanities > School of Computing & Mathematical Sciences School of Computing & Mathematical Sciences > Department of Mathematical Sciences Faculty of Architecture, Computing & Humanities > School of Computing & Mathematical Sciences > Department of Mathematical Sciences |

Related URLs: | |

Last Modified: | 26 Mar 2012 11:55 |

URI: | http://gala.gre.ac.uk/id/eprint/7952 |

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