Study on the mechanism of inhomogeneous microdamage in short-pulse laser processing of carbon fiber reinforced plastic

Xu, Luyao; Lu, Jiuru; Li, Kangmei; Hu, Jun

doi:10.1177/0731684420983594

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…Jiang et al [48] used an infrared femtosecond laser with a maximum power of 10 W to drill a CFRP plate with a thickness of 2 mm, obtaining a heat-affected zone of less than 10 μm, which fully demonstrated the advantages of ultrafast laser processing of CFRP. Therefore, the pulse width has a significant impact on the processing quality of CFRP, and a shorter pulse width can significantly reduce the heat-affected zones [49,50].…”

Section: Pulse Widthmentioning

confidence: 99%

“…When the pulse energy was 0.26 mJ and 0.40 mJ, the resin and carbon fibers were ablated. Xu et al [49] Used a Nd:YVO4 nanosecond laser to cut CFRP plates. Four groups of pulses with different energy were set between 5 W and 20 W, and the conclusion was similar to that of Oliveira et al, [51] that is, the processing quality decreased with the increase of pulse energy.…”

Section: Pulse Energymentioning

confidence: 99%

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Research progress on the quality and efficiency of carbon fiber reinforced thermoplastic polymer composites processed by laser

et al. 2022

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Carbon fiber reinforced plastics (CFRP) has been widely used in aerospace, military weapons, new energy and high-end vehicles due to its specific and superior strength, low density and long-lasting wear resistance. The processing of CFRP is very different from the traditional metal processing because of its heterogeneous structure, anisotropy and superior wear resistance of CFRP. Usually, CFRP has often various defects in mechanical processing and water jet processing, such as interlayer tearing, fiber pull-out, delamination, tool wear, and abrasive penetration. Through laser processing, the problems of CFRP materials existing in mechanical processing can be overcome. However, due to the huge differences in thermal physical properties such as thermal conductivity and vaporization temperature of carbon fiber and resin in CFRP, its laser processing also turns out to have some issues, such as heat-affected zone and fiber end expansion. This paper summarizes the research results of CFRP laser processing in China and internationally. Research progress was introduced in detail from various aspects including laser and material mechanism as well as laser processing parameters. It reports the experimental and theoretical studies covering the process accuracy in edge quality and the thermal characteristics in terms of heat-affected zone. Eliminating the heat-affected zone in the polymer matrix are considered the major obstacles of CFRP industrial applications. The methods of improving processing efficiency by increasing material removal rate and reducing processing time were reviewed. The influence of different thermal conductivity of carbon fiber and resin matrix in CFRP on the processing quality was discussed. Finally, the development trend and challenges of thermal conductivity of carbon fiber and resin in CFRP in theoretical modeling were proposed.

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Section: Pulse Widthmentioning

confidence: 99%

Section: Pulse Energymentioning

confidence: 99%

Research progress on the quality and efficiency of carbon fiber reinforced thermoplastic polymer composites processed by laser

et al. 2022

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“…Under the combined action of laser irradiation and tangential airflow, complex ablation behaviors may occur, such as pyrolysis of the polymer matrix, oxidation and sublimation of residual char and fibers, and thermomechanical erosion. Several works have been reported on the laser ablation of polymer-based composites [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. There are few studies considering the influence of tangential airflow.…”

Section: Introductionmentioning

confidence: 99%

Instantaneous Ablation Behavior of Laminated CFRP by High-Power Continuous-Wave Laser Irradiation in Supersonic Wind Tunnel

Wang

Song

et al. 2023

Materials

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Experimental and numerical investigations of the instantaneous ablation behavior of laminated carbon fiber-reinforced polymer (CFRP) exposed to an intense continuous-wave (CW) laser in a supersonic wind tunnel are reported. We establish an in situ observation measurement in the experiments to examine the instantaneous ablation behavior. The surface recession depth is calculated by using the Particle Image Velocimetry (PIV) method, taking the ply angle of laminated CFRP as a reference. A coupled thermal-fluid-ablation numerical model incorporating mechanisms of oxidation, sublimation, and thermomechanical erosion is developed to solve the ablation-through problem of multilayer materials. The results show that the laser ablation depth is related to the laser power density, airflow velocity and airflow mode. Thermomechanical erosion is the primary ablation mechanism when the surface temperature is relatively low and the cavity flow mode is a closed cavity flow. When the surface temperature reaches the sublimation of carbon and the airflow mode is transformed to open cavity flow, sublimation plays a dominant role and the ablation rate of thermomechanical erosion gradually decreases.

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“…CFRP composites are widely fabricated by laser processing such as laser cutting, laser drilling, laser surface treatment, and so on [29,30]. As laser is developing to higher power, aerospace vehicles are facing its threat of serious damage.…”

Section: Introductionmentioning

confidence: 99%

Laser Irradiation Behavior of Carbon Fiber Epoxy Resin Composites with Laminar Structure

Tian

et al. 2022

Crystals

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Laser attracts more attention and it could cause material failure by its high energy. Carbon fiber resin composites are widely used in aerospace vehicles experiencing dramatic damage to their surface if exposed to high-energy laser irradiation. The available studies on irradiation behavior are mainly focused on pulsed lasers and bulk composites, and investigations of thin laminar structures under continuous-wave laser irradiation have rarely been reported. In this study, the damage behavior of laminar carbon fiber epoxy resin composites (CFE composites) was studied. Using a threshold model of resin pyrolysis, CFE composite is observed to be damaged at 0.18 s when irradiated at 100 W/cm2, and if the laser power density is increased to 200 W/cm2 for 2 s, no resin remains on the fiber surface, which is now completely exposed. With an increase in power density and irradiation time, the ablation rate always shows an upward trend: the ablation region expands and the separation of layers in the interior appears, which can reach 0.01156 g/s when irradiated at 100 W/cm2 for 5 s. The damage mechanism of CFE composite was also revealed by the temperature evolution data, thermogravimetric analysis, and composition change.

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Study on the mechanism of inhomogeneous microdamage in short-pulse laser processing of carbon fiber reinforced plastic

Cited by 7 publications

References 11 publications

Research progress on the quality and efficiency of carbon fiber reinforced thermoplastic polymer composites processed by laser

Research progress on the quality and efficiency of carbon fiber reinforced thermoplastic polymer composites processed by laser

Instantaneous Ablation Behavior of Laminated CFRP by High-Power Continuous-Wave Laser Irradiation in Supersonic Wind Tunnel

Laser Irradiation Behavior of Carbon Fiber Epoxy Resin Composites with Laminar Structure

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