Strength and failure modes of surface treated CFRP secondary bonded single-lap joints in static and fatigue tensile loading regimes

Park, Seongmin; Roy, Rene; Kweon, Jin‐Hwe; Nam, Young‐Woo

doi:10.1016/j.compositesa.2020.105897

Cited by 45 publications

(24 citation statements)

References 36 publications

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“…They evaluated the improvement in the strength of SLJs as a function of their surface treatment and ranked them as PAA > Milling > SB + SAA > SAA. The effects of different surface treatments (e.g., manual sanding, grit blasting, and peel-ply plus grit blasting) on fatigue and tensile behavior of SLJs made of CFRP-laminates were analyzed by Park et al 20 The results of this study revealed that static strength retention at one million cycles was calculated at 55.4% for the sanding treatment, 47.5% for grit blasting, and 50.3% for peel-ply plus grit blasting. Xi et al 21 used two-step laser surface treatment to enhance the SLJ shear-lap performance of CFRP-laminates in which a 40.8% enhancement in shear strength of the specimens compared with untreated ones was reported.…”

Section: Introductionmentioning

confidence: 89%

Strength and failure mechanism of single-lap magnesium-basalt fiber metal laminate adhesively bonded joints: Experimental and numerical assessments

Mottaghian

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

2022

Journal of Composite Materials

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A quick literature search reveals the significant lack of data and information concerning magnesium-to-magnesium bonded joints as well as fiber-metal laminates (FMLs) made with magnesium alloys. Therefore, a systematic series of experimental and numerical investigations are carried out to assess the performance of single-lap joints mating FML adherends. The primary goal is to better understand the effects of geometrical and material parameters that influence the performance of magnesium-to-magnesium joints. The FML adherends used in this study consist of basalt natural fiber-epoxy laminate sandwiched in between thin sheets of magnesium alloys, which were subsequently adhesively bonded using a room-cured epoxy resin. The effects of two types of surface treatments, namely, “sandblasting” and “sandblasting with resin coating” on the bond strength and failure mechanism of the adhesively bonded joints (ABJs) are investigated. A 3D numerical model developed to simulate the response of the joints subjected to quasi-static lap-shear tests. This model, which accounts for the material and geometrical nonlinearity in the joints, is used to perform a parametric analysis for establishing the optimal overlap bond length. The distributions of the shear and peel stresses in the overlap region and the effects of adhesive thickness on the performance of the joints are systematically examined. The comparison of the experimental data and numerical results confirms the robustness and cost-effectiveness of the numerical model in predicting the response of such single-lap ABJs.

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Section: Introductionmentioning

confidence: 89%

Strength and failure mechanism of single-lap magnesium-basalt fiber metal laminate adhesively bonded joints: Experimental and numerical assessments

Mottaghian

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

2022

Journal of Composite Materials

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“…The carbon fiber reinforced plastic (CFRP) laminates were fabricated using unidirectional carbon/epoxy prepreg material (USN-125B, SK Chemicals, South Korea) through an autoclave process. A nominal cured ply thickness of prepreg is 0.12 mm, and the fiber volume fraction is approximately 57.5% 50 A total of 32 plies were layered by the stacking sequence of [45/90/-45/0] 4S . The fabricated laminates were cut to 150 mm × 100 mm in case of CAI test specimens and 180 mm × 40 mm in case of three-point bending test specimens.…”

Section: Materials Preparationmentioning

confidence: 99%

Injection repair of CFRP using a multi-Wall carbon nanotubes-modified epoxy resin: Flexural and compression behavior

Shin

Choe

Lee

et al. 2022

Journal of Composite Materials

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This study presented the details of multi-wall carbon nanotubes (MWCNTs)-modified resin injection repair aiming to enhance the mechanical properties, considering the flexural and compression behavior. The resin injection of epoxy resin dispersed with MWCNTs (0.1, 0.3, and 0.5 wt.%) as low viscosity resin that delaminated composite structure repair was conducted using a developed vacuum-based resin injection system at 80°C with constant injection pressure. The quasi-static indentation (QSI) method with a circular window was applied to create the barely visible impact damage (BVID) in the laminate specimen and thus obtain the delamination damage with reproducibility. The flexural strength and compression after impact (CAI) test were conducted on repaired carbon fiber reinforced laminates to assess the effect of the dispersion of the MWCNTs in the epoxy resin injection approach compared to neat epoxy resin. The mechanical test results exhibited that the recovery rate was better improved in the case of the modified resin infiltration approach in laminate composites dispersed with nanoparticles. It was attributed to their more enhanced strengthening mechanisms under effective interaction in mixed interface of fiber-matrix-MWCNTs, mainly attributing to bridge connection and stronger interfacial adhesion properties.

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“…To pre-treat the surfaces of CFRP, various different methods are developing. When CFRP is manufactured using an autoclave, peel plies are frequently employed on the surface of the composite which, upon removal prior to adhesive bonding, control surface morphology [20,22]. Some peel plies which are impregnated with a resin (known as wet peel plies) can affect the surface chemistry by controlling the volatilization of superficial resin during CFRP manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Effect of CFRP surface topography on the adhesion and strength of composite-composite and composite-metal joints

Viswanathan-Chettiar

Sun

et al. 2023

Composites Part A: Applied Science and Manufacturing

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Strength and failure modes of surface treated CFRP secondary bonded single-lap joints in static and fatigue tensile loading regimes

Cited by 45 publications

References 36 publications

Strength and failure mechanism of single-lap magnesium-basalt fiber metal laminate adhesively bonded joints: Experimental and numerical assessments

Strength and failure mechanism of single-lap magnesium-basalt fiber metal laminate adhesively bonded joints: Experimental and numerical assessments

Injection repair of CFRP using a multi-Wall carbon nanotubes-modified epoxy resin: Flexural and compression behavior

Effect of CFRP surface topography on the adhesion and strength of composite-composite and composite-metal joints

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