UV-laser cleaning and surface characterization of an aerospace carbon fibre reinforced polymer

Rauh, B.; Kreling, Stefan; Kolb, M.; Geistbeck, Matthias; Boujenfa, S.; Suess, Manuela; Dilger, Klaus

doi:10.1016/j.ijadhadh.2017.12.016

Cited by 58 publications

(37 citation statements)

References 18 publications

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“…In this case, silicone release agents are used to facilitate demolding. However, these release agents remain on the PCM CFRP surfaces, interfering with chemical bonding and adhesion [10][11][12]. This induces surface irregularities via resin delamination during demolding.…”

Section: Stress Concentration Is Another Major Issue Duringmentioning

confidence: 99%

“…This method selectively removes surface contaminants with little damage to the fibers. Depending on the wavelength and radiation, the surface cutting can be adjusted [11]. Although laser processing can be delicate, there are many limitations to its applications in automotive processes due to equipment cost.…”

Section: Stress Concentration Is Another Major Issue Duringmentioning

confidence: 99%

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Enhanced Surface Properties of Carbon Fiber Reinforced Plastic by Epoxy Modified Primer with Plasma for Automotive Applications

et al. 2020

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Carbon fiber reinforced plastic (CFRP) is currently used as a lightweight material in various parts of automobiles. However, fiber reinforced plastic (FRP) material may be damaged at the time of joining via mechanical bonding; therefore, adhesion is important. When bonding is conducted without surface CFRP treatment, interfacial destruction occurs during which the adhesive falls off along with the CFRP. Mechanical strength and fracture shape were investigated depending on the surface treatment (pristine, plasma treatment times, and plasma treatment times plus epoxy modified primer coating). The plasma treatment effect was verified using the contact angle and X-ray photoelectron spectroscopy. The wettability of the epoxy modified primer (EMP) coating was confirmed through surface morphology analysis, followed by observation of mechanical properties and fracture shape. Based on test data collected from 10 instances of plasma treatment, the EMP coating showed 115% higher strength than that of pristine CFRP. The adhesive failure shape also changed from interfacial failure to mixed-mode failure. Thus, applying an EMP coating during the automotive parts stage enhances the effect of CFRP surface treatment.

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Section: Stress Concentration Is Another Major Issue Duringmentioning

confidence: 99%

Section: Stress Concentration Is Another Major Issue Duringmentioning

confidence: 99%

Enhanced Surface Properties of Carbon Fiber Reinforced Plastic by Epoxy Modified Primer with Plasma for Automotive Applications

et al. 2020

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“…[3][4][5][6][7][8][9] Important publications are those from Kreling 3 and Kraus et al, 4 but most are based on the investigation of carbon fiber-reinforced plastics (CFRP) with epoxy matrix. Investigations with impurities on joining surfaces were carried out by Palmieri et al 5 and Rauh et al 6 Palmieri focuses on the detection of silicones in the form of release agents on CFRP components under consideration of the ablation product, and greases in the form of fingerprints are not considered. He has shown that there are several ways to detect impurities, but most methods are not economical in an industrial manufacturing process.…”

Section: Introductionmentioning

confidence: 99%

Individualized and controlled laser beam pretreatment process for adhesive bonding of fiber-reinforced plastics—Part I: Optical detection of impurities on the component surface

Weiland

Kunze

Dittmar

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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This paper deals with the detection and localization of impurities such as release agent residues and fingerprints on fiber-reinforced plastic surfaces in an inline process step. This information can be used to carry out a locally individual and controlled surface pretreatment using laser radiation in order to improve the adhesion conditions. In this paper, surfaces from polyamide 6 reinforced with glass fiber are considered. To detect the impurities, inline images of the joining surfaces are taken using a laser line triangulation system. These image data are then examined with a specially developed algorithm of digital image processing. The real-time algorithm is based on the method of material-specific threshold values. In addition to real impurities, the algorithm was validated with artificial impurities. The central result of this work is the detection and local impurities of release agent residues and fingerprints down to a detail size of 0.3 mm.

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“…There is a growing demand for carbon fiber reinforced polymer (CFRP) composites as structural parts including in the automotive industries and the aerospace area owing to their outstanding mechanical properties , chemical resistance , and light weight . Compared with thermosetting polymer composites , thermoplastic composites have developed rapidly because thermoplastic composites have many advantages such as short cycle time, recyclability, and outstanding chemical and corrosion resistance .…”

Section: Introductionmentioning

confidence: 99%

Higher mechanical performances of CF/PEEK composite laminates via reducing interlayer porosity based on the affinity of functional s‐PEEK

et al. 2019

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Extensive application of carbon fiber-reinforced thermoplastic composites has been severely limited by two essential drawbacks including poor interfacial adhesion and harmful void volume fraction between the fiber and the thermoplastic matrix. These drawbacks are due to the surface inertness and high viscosity of thermoplastic during the forming process, respectively. To address these challenges, we report a strategy in which sulfonated polyetheretherketone (s-PEEK) with strong affinity was successfully obtained as a compatibilizer to modify the interfacial micromechanical properties of carbon fiber (CF) reinforced polyetheretherketone (PEEK) composites. Using optimum mass amount of s-PEEK, the interlaminar shear strength (ILSS) and tensile strength of the improved CF/PEEK composite laminates were 78.6 and 795 MPa, which had been increased more than 45.6% and 11.2% as compared with the original CF/PEEK composite laminates, respectively. The reason was that internal voids and interfacial bonding between CF and PEEK matrix were obviously improved by s-PEEK. The affinity of s-PEEK offered new insights to overcome the poor interfacial adhesion for fabricating structural parts with thermoplastic composites. The functionalized CF/PEEK composites have been successfully applied to fabricate a car interior ornament, well meeting the requirements of lightweight and high strength of automobiles.

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UV-laser cleaning and surface characterization of an aerospace carbon fibre reinforced polymer

Cited by 58 publications

References 18 publications

Enhanced Surface Properties of Carbon Fiber Reinforced Plastic by Epoxy Modified Primer with Plasma for Automotive Applications

Enhanced Surface Properties of Carbon Fiber Reinforced Plastic by Epoxy Modified Primer with Plasma for Automotive Applications

Individualized and controlled laser beam pretreatment process for adhesive bonding of fiber-reinforced plastics—Part I: Optical detection of impurities on the component surface

Higher mechanical performances of CF/PEEK composite laminates via reducing interlayer porosity based on the affinity of functional s‐PEEK

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