Effects of surface laser treatment on direct co-bonding strength of CFRP laminates

Leone, Claudio; Genna, Silvio

doi:10.1016/j.compstruct.2018.03.096

Cited by 71 publications

(15 citation statements)

References 57 publications

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“…An alternative and effective joining method for composites is co-bonding (an uncured part is joined with one or more cured parts) [ 23 , 24 ]. The co-bonding method can be applied for jointing both similar or dissimilar materials including thermoplastics to thermosets.…”

Section: Introductionmentioning

confidence: 99%

Co-Bonded Hybrid Thermoplastic-Thermoset Composite Interphase: Process-Microstructure-Property Correlation

Zanjani

Baran

2021

Materials

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Co-bonding is an effective joining method for fiber-reinforced composites in which a prefabricated part bonds with a thermoset resin during the curing process. Manufacturing of co-bonded thermoset-thermoplastic hybrid composites is a challenging task due to the complexities of the interdiffusion of reactive thermoset resin and thermoplastic polymer at the interface between two plies. Herein, the interphase properties of co-bonded acrylonitrile butadiene styrene thermoplastic to unsaturated polyester thermoset are investigated for different processing conditions. The effect of processing temperature on the cure kinetics and interdiffusion kinetics are studied experimentally. The interphase thickness and microstructure are linked to the chemo-rheological properties of the materials. The interdiffusion mechanisms are explored and models are developed to predict the interphase thickness and microstructure for various process conditions. The temperature-dependent diffusivities were estimated by incorporating an inverse diffusion model. The mechanical response of interphases was analyzed by the Vickers microhardness test and was correlated to the processing condition and microstructure. It was observed that processing temperature has significant effect on the interdiffusion process and, consequently, on the interphase thickness, its microstructure and mechanical performance.

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Section: Introductionmentioning

confidence: 99%

Co-Bonded Hybrid Thermoplastic-Thermoset Composite Interphase: Process-Microstructure-Property Correlation

Zanjani

Baran

2021

Materials

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“…The fragmented material could be ejected from the hole to the composite surface by pyrolysis gases; then, it could either be removed from the surface or ablated by the oxidation reaction. The mechanical erosion of the CFRPs by the pyrolysis gases was experimentally confirmed in the interaction process of the ns pulse laser and the CFRPs [21][22][23].…”

Section: Simulation Of the Internal Gas Pressurementioning

confidence: 83%

Investigation on the Continuous Wave Mode and the ms Pulse Mode Fiber Laser Drilling Mechanisms of the Carbon Fiber Reinforced Composite

Hou

Han

et al. 2020

Polymers

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The near infrared (NIR) laser drilling of a carbon fiber reinforced polymer (CFRP) composite in the continuous wave (CW) mode and the ms pulse mode was investigated by an experiment and a numerical simulation. The relationships between the laser penetrating time, entrance hole diameter, surface heat affected zone (HAZ) width, and material ablation rate and the laser irradiation time and laser peak power densities were obtained from the experiment. For the same average power density of the laser output, 3.5 kW/cm2, it was found that the ms pulse laser mode, which had a higher peak power density, had a higher drilling efficiency. When drilling the same holes, the pulse laser mode, which had the highest peak power density of 49.8 kW/cm2, had the lowest drilling time of 0.23 s and had the smallest surface HAZ width of 0.54 mm. In addition, it was found that the laser penetrating time decreased sharply when the peak power density was higher than 23.4 kW/cm2. After analyzing the internal gas pressure by the numerical simulation, it was considered that a large internal gas pressure appeared, which resulted from polymer pyrolysis, causing a large amount of the mechanical erosion of the composite material to improve the drilling efficiency. Therefore, the ms pulse laser showed its potential and advantage in laser drilling the CFRP composite.

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“…This is due to the good absorption of organic materials and high output powers of CO 2 laser. 19 After laser pretreatment, not only pollutants are removed, carbon fibers are also exposed, which would create a direct bond between injected polymer and fibers in the following overmolding process. Moreover, the exposed fibers are not found to be fractured, which appear continuously and integrally.…”

Section: Characterizationmentioning

confidence: 99%

“…According to the published literatures, the surface pretreatment methods of polymeric surface, such as coupling agent method, 15 physical high-energy radiation treatments including plasma 16,17 and laser processing, [18][19][20][21] flame surface treatment, 22 have been commonly used to improve the adhesion between polymeric material and other material. Especially, Bauer et al 17 successfully fabricated overmolded thermoplastic-thermoset composites with high interface adhesion strength through pretreating the continuous fiber reinforced epoxy composites with low-pressure plasma.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of interfacial strength of overmolded hybrid structures of short fiber reinforced polyamide 6 on continuous fiber reinforced epoxy composites under various surface pretreatments

et al. 2021

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Effects of surface laser treatment on direct co-bonding strength of CFRP laminates

Cited by 71 publications

References 57 publications

Co-Bonded Hybrid Thermoplastic-Thermoset Composite Interphase: Process-Microstructure-Property Correlation

Co-Bonded Hybrid Thermoplastic-Thermoset Composite Interphase: Process-Microstructure-Property Correlation

Investigation on the Continuous Wave Mode and the ms Pulse Mode Fiber Laser Drilling Mechanisms of the Carbon Fiber Reinforced Composite

Enhancement of interfacial strength of overmolded hybrid structures of short fiber reinforced polyamide 6 on continuous fiber reinforced epoxy composites under various surface pretreatments

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