Study on Heat Transfer Models and Mechanisms for Nanosecond Laser Removal of Paint Layers

YU Songjie; CUI Gaowei; XU Guangying

doi:10.21656/1000-0887.440344

Volume 45 Issue 12

Dec. 2024

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YU Songjie, CUI Gaowei, XU Guangying. Study on Heat Transfer Models and Mechanisms for Nanosecond Laser Removal of Paint Layers[J]. Applied Mathematics and Mechanics, 2024, 45(12): 1577-1588. doi: 10.21656/1000-0887.440344

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Study on Heat Transfer Models and Mechanisms for Nanosecond Laser Removal of Paint Layers

doi: 10.21656/1000-0887.440344

School of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, P.R.China

Received Date: 2023-12-04
Rev Recd Date: 2024-07-11

Available Online: 2024-12-27

Abstract

Abstract

In view of the absorption and diffusion characteristics of laser in the paint layer and the base layer, heat transfer model Ⅰ and thermal connection boundary conditions for the paint layer and the metal base layer was established. As a comparison, corresponding heat transfer models Ⅱ and Ⅲ were established, with the thermal connection conditions at the interface between the paint layer and the base layer ignored. In model Ⅲ, both the paint layer and the base layer were connected to the bulk heat source. A semianalytical solution to the problem was obtained through the Laplacian transformation. Corresponding numerical solution examples were given through the Laplacian numerical inverse transformation. The results show that, model Ⅰ gives continuous temperature distributions, while model Ⅱ and model Ⅲ give discontinuous temperature distributions, which goes against physical reality. Secondly, based on model Ⅰ, the predicted time and energy density for cleaning and removing the paint layer are between those of model Ⅱ and model Ⅲ. The work provides a theoretical reference for improving the laser cleaning process.
- cleaning model,
- thermal connection condition,
- damage threshold,
- thermal stress

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References(25)

References

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