Laser ablation of CFRP surfaces for improving the strength of bonded scarf composite joints

ALYousef, Jassem; Yudhanto, Arief; Tao, Ran; Lubineau, Gilles

doi:10.1016/j.compstruct.2022.115881

Cited by 9 publications

(3 citation statements)

References 44 publications

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“…A number of strategies that have been proposed to enhance the mechanical performance of adhesively bonded joints generally falls within two main categories: substrate modification [ [6] , [7] , [8] , [9] , [10] , [11] ] and adhesive modification [ [12] , [13] , [14] , [15] , [16] ]. Substrate modification includes geometrical or surface changes of the substrate, e.g., increasing substrate thickness at the overlapping region, creating a wedge at the substrate tip, making a streamlined thickness transition in the region away from the overlapping region to minimize the load path eccentricity, surface patterning.…”

Section: Introductionmentioning

confidence: 99%

Modeling of single-lap joints with auxetic adhesive utilizing homogeneous and heterogeneous bondline microstructures

Puspaningtyas,

Jusuf,

Hadi

et al. 2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Modeling of single-lap joints with auxetic adhesive utilizing homogeneous and heterogeneous bondline microstructures

Puspaningtyas,

Jusuf,

Hadi

et al. 2024

Heliyon

Self Cite

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“…However, throughout the service life of an aircraft, various damages are inevitable, including those caused by bird strikes, lightning strikes, erosion by wind and rain, and accidental damage, leading to an overall decrease in structural integrity. 5 To maintain flight safety, repairs must be performed on the damage incurred. Currently, the commonly used method to restore the integrity of composite aircraft structures is the scarf/step-bonded repair, which can successfully achieve good aerodynamic form and improve the post-repair strength of the composite structure.…”

Section: Introductionmentioning

confidence: 99%

“…It is gradually transitioning towards large and integrated structures, such as the entire composite fuselages utilized in aircraft models like the B787 and A350. However, throughout the service life of an aircraft, various damages are inevitable, including those caused by bird strikes, lightning strikes, erosion by wind and rain, and accidental damage, leading to an overall decrease in structural integrity 5 . To maintain flight safety, repairs must be performed on the damage incurred.…”

Section: Introductionmentioning

confidence: 99%

Layer ablation and surface textured of Carbon fiber reinforced plastics by infrared pulsed laser

Li,

Wang,

Yang

et al. 2023

Polymer Composites

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For high‐quality composite bonded repairs, the research utilized a 1064 nm infrared pulsed laser to obtain geometry and texturing surface. The impact of grinding and laser treatment (0.4, 0.7, and 1.5 J/cm2) on the surface features of composite material was investigated, along with the tensile strength and failure modes. Findings demonstrated that laser treatment could significantly enhance surface roughness parameters and wetting properties compared to grinding. Additionally, an optimal laser energy density of 0.7 J/cm2 achieves complete resin removal without fiber damage while creating a laser‐induced periodic surface structure (LIPSS) based on a fiber weaving texture. The research revealed the synergistic bonding mechanism of “submicron mechanical locking” and “micron anchoring.” Laser treatment enhances the tensile strength of repaired specimens to 445 MPa, which was 90% of the original specimens, and substrate fracture was the associated failure mode.Highlights This paper applies laser technology to simultaneously achieve 3D geometry and surface texture on composites bonded repairs. A laser‐induced periodic surface structure was achieved while the resin was completely removed without carbon fiber damage. The tensile recovery rate of the laser‐treated sample was satisfied with the requirements of aircraft maintenance.

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Decomposition of matrix in basalt fiber‐reinforced composites using laser processing parameters for clear unveiling of fibers without damage

Ürgün,

Fidan,

Özsoy

et al. 2024

Polymer Composites

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This work investigates the effects of laser processing parameters on basalt fiber‐reinforced composites for the optimization of surface processing without fiber damage. Various conditions of laser power, speed, and stand‐off distance were applied using a CO₂ laser. Consequently, a well‐processed morphology with full matrix removal and clear fiber exposure was achieved under optimized conditions of 32 W power, 200 mm/s speed, and 5 mm SOD. Those parameters resulted in a surface roughness Sa of 6.11 μm. Using the optimum parameters obtained from the experiments, the surface energy density was computed as 0.89 J/mm2, while ensuring adequate material removal without damage to the fiber. Lower power input of 20 W resulted in incomplete removal of the matrix; on the other extreme, unreasonably high powers resulted in fiber degradation. The experiments determined that optimum laser parameters indeed play a critical role in the processing of basalt fiber composites surfaces.Highlights Ideal laser settings: 32 W, 200 mm/s, 5 mm SOD. Full‐matrix removal and fiber exposition realized without any damage. The achieved surface roughness Sa is 6.11 μm for optimized laser parameters. Excessive laser power leads to a fiber damage.

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Laser ablation of CFRP surfaces for improving the strength of bonded scarf composite joints

Cited by 9 publications

References 44 publications

Modeling of single-lap joints with auxetic adhesive utilizing homogeneous and heterogeneous bondline microstructures

Modeling of single-lap joints with auxetic adhesive utilizing homogeneous and heterogeneous bondline microstructures

Layer ablation and surface textured of Carbon fiber reinforced plastics by infrared pulsed laser

Decomposition of matrix in basalt fiber‐reinforced composites using laser processing parameters for clear unveiling of fibers without damage

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