Infrared and Laser Engineering, Volume. 54, Issue 6, 20240556(2025)

Experimental study on laser removal of surface resin in carbon fiber composites and adhesive bonding performance

Wei WANG1,2, Wei WANG1,2, Tianhao YAO1,2, Dong JI1,2, Shuo TIAN1,2, Weijun LIU1,2, and Hongyou BIAN1,2
Author Affiliations
  • 1Liaoning Key Laboratory of Laser Surface Engineering Technology, Shenyang University of Technology, Shenyang 110870, China
  • 2School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China
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    Figures & Tables(19)
    Surface of carbon fiber reinforced polymer
    Schematic diagram of laser stripping device
    Schematic diagram of CFRP sample adhesive joint
    Microscopic morphology under different laser energy density. (a) 4.77 J/cm2; (b) 5.17 J/cm2; (c) 5.57 J/cm2; (d) 5.97 J/cm2; (e) 6.37 J/cm2; (f) 6.76 J/cm2; (g) 7.16 J/cm2; (h) 7.56 J/cm2; (i) 7.96 J/cm2
    Microscopic morphology of laser at different traveling speed. (a) 6 mm/s; (b) 5.5 mm/s; (c) 5 mm/s; (d) 4.5 mm/s; (e) 4 mm/s; (f) 3.5 mm/s; (g) 3 mm/s
    Measurement data of contact angle between distilled water and glycerol
    Surface free energy of different specimen codes
    Diagram of maximum tension and strength of different specimens
    XRD patterns of different laser parameter combinations
    Morphology of carbon fiber reinforced polymer and aluminum alloy section. (a) W; (b) D; (c) S1 4.77 J/cm2,6 mm/s; (d) S2 5.97 J/cm2,4 mm/s; (e) S3 6.37 J/cm2,4 mm/s; (f) S4 7.96 J/cm2,2 mm/s
    Epoxy resin removal mechanism
    • Table 1. Performance parameters of carbon fiber composites

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      Table 1. Performance parameters of carbon fiber composites

      MaterialMass fractionDensity/g·cm−3Thermal conductivity coefficient/W·m−1·K−1
      T300 carbon fiber62%1.7850 (along the fiber direction)10 (vertical fiber direction)
      Epoxy resin38%1.20.1
    • Table 2. Main process parameters

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      Table 2. Main process parameters

      Main process parameterNumerical value
      Laser power/W120-200
      Laser energy density/J·cm−24.77-7.96
      Pulse frequency/kHz20
      Pulse width/ns60
      Spot diameter/mm0.4
      Line width (galvanometer)/mm100
      Laser travel speed/mm·s−12-6
      Laser scanning speed/mm·s−13000
    • Table 3. Factor level table

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      Table 3. Factor level table

      FactorLevel 1Level 2Level 3
      Energy density/J·cm−24.776.37 7.96
      Travel speed/mm·s−12 4 6
    • Table 4. Orthogonal test result

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      Table 4. Orthogonal test result

      Experiment No.Energy density/J·cm−2Travel speed/mm·s−1Test result
      14.772
      24.774
      34.776
      46.372
      56.374
      66.376
      77.962
      87.964
      97.966
    • Table 5. Distribution of element content with different laser energy density

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      Table 5. Distribution of element content with different laser energy density

      Element contentLaser energy density/J·cm−2
      4.775.175.575.976.376.767.167.567.96
      C element70.84%79.01%85.77%88.2%94.38%94.45%95.63%92.03%93.14%
      O element25.27%20.86%13.99%11.62%5.49%5.03%3.93%6.34%5.88%
      Other3.89%0.13%0.24%0.18%0.13%0.52%0.44%1.63%0.98%
    • Table 6. Distribution of element content with different laser traveling speed

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      Table 6. Distribution of element content with different laser traveling speed

      Element contentLaser traveling speed/mm·s−1
      65.554.543.532.52
      C element74.06%67.90%73.31%78.71%94.25%94.39%93.75%94.58%94.86%
      O element22.39%27.75%25.93%20.62%4.95%4.89%5.77%4.36%4.29%
      Other3.55%4.35%0.76%0.67%0.80%0.72%0.48%1.06%0.85%
    • Table 7. Different parameter combinations and their codes

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      Table 7. Different parameter combinations and their codes

      Sample codeLaser energy density/J·cm−2Laser traveling speed/mm·s−1Treatment
      W--Untreated
      D--Mechanical grinding
      S14.776Laser cleaning
      S25.974Laser cleaning
      S36.374Laser cleaning
      S47.962Laser cleaning
    • Table 8. Fatigue performance test

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      Table 8. Fatigue performance test

      Test groupMaximum load/NNumber of cyclesFailure mode
      Laser treatment4063.94144000No failure
      Mechanical grinding3373.0495374Carbon fiber-adhesive-aluminum hybrid failure
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    Wei WANG, Wei WANG, Tianhao YAO, Dong JI, Shuo TIAN, Weijun LIU, Hongyou BIAN. Experimental study on laser removal of surface resin in carbon fiber composites and adhesive bonding performance[J]. Infrared and Laser Engineering, 2025, 54(6): 20240556

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    Paper Information

    Category: Laser

    Received: Jan. 3, 2025

    Accepted: Mar. 18, 2025

    Published Online: Jul. 1, 2025

    The Author Email:

    DOI:10.3788/IRLA20240556

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