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Thermal effect of laser ablation on the surface of carbon fiber reinforced plastic during laser processing

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Abstract

Although laser processing is widely used for many applications, the cutting quality of carbon fiber reinforced plastic (CFRP) decreases around the heat-affected zone (HAZ) during laser processing. Carbon fibers are exposed around the HAZ, and tensile strength decreases with increasing length of the HAZ. Some theoretical studies of thermal conductions that do not consider fluid dynamics have been performed; however, theoretical considerations that include the dynamics of laser ablation are scarce. Using removed mass and depth observed from experiments, the dynamics of laser ablation of CFRP with high-temperature and high-pressure of compressive gas is simulated herein. In this calculation, the mushroom-like shape of laser ablation is qualitatively simulated compared with experiments using a high-speed camera. Considering the removal temperature of the resin and the temperature distribution at each point on the surface, the simulation results suggest that a wide area of the resin is removed when the processing depth is shallow, and a rounded kerf is generated as the processing depth increases.

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Acknowledgements

This study is partially supported by Amada Foundation (Grant number: AF-2015209).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachiouji, Tokyo, 192-0914, Japan

    Tomomasa Ohkubo & Ei-ichi Matsunaga

  2. Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan

    Yuji Sato & Masahiro Tsukamoto

Authors
  1. Tomomasa Ohkubo
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  2. Yuji Sato
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  3. Ei-ichi Matsunaga
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  4. Masahiro Tsukamoto
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Correspondence to Tomomasa Ohkubo.

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Ohkubo, T., Sato, Y., Matsunaga, Ei. et al. Thermal effect of laser ablation on the surface of carbon fiber reinforced plastic during laser processing. Appl. Phys. A 124, 149 (2018). https://doi.org/10.1007/s00339-018-1578-5

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  • DOI: https://doi.org/10.1007/s00339-018-1578-5

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