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Description of transmitted energy during laser transmission welding of polymers

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Abstract

It is important to describe the laser energy distribution in polymers properly when modeling heat transfer during laser transmission welding of thermoplastics. This paper presents an analytical model that describes the energy transmission in laser transmission welding of light scattering polymers. The model considers that the transmitted laser beam in a scattering polymer can be represented by scattered and unscattered components. The distribution of the scattered energy from any point in the incident beam is Gaussian. The transmitted power from the discretized input beam is summed to create a normalized power flux distribution model. The model was validated using the measured laser energy distributions after transmission through parts made of polypropylene, as well as unreinforced and glass fiber reinforced polyamide 6.

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Acknowledgments

The authors would like to thank MAHLE Filter Systems, Decoma International, Ontario Centres of Excellence, and AUTO21 NCE for their financial assistance. The authors also acknowledge Ms. Xiaochao Cao and Dr. Chuanyang Wang for their help with the experiments.

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Authors and Affiliations

  1. Mechanical and Materials Engineering, Queen’s University, Kingston, ON, Canada

    M. Chen & G. Zak

  2. Chemistry and Chemical Engineering, Royal Military College, Kingston, ON, Canada

    P. J. Bates

Authors
  1. M. Chen
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  2. G. Zak
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  3. P. J. Bates
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Corresponding author

Correspondence to P. J. Bates.

Additional information

Doc. IIW-2323, recommended for publication by Commission XVI “Polymer Joining and Adhesive Technology”.

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Chen, M., Zak, G. & Bates, P.J. Description of transmitted energy during laser transmission welding of polymers. Weld World 57, 171–178 (2013). https://doi.org/10.1007/s40194-012-0003-5

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  • DOI: https://doi.org/10.1007/s40194-012-0003-5

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