Interlaminar Shear Strength and Failure Analysis of Aluminium-Carbon Laminates with a Glass Fiber Interlayer after Moisture Absorption

Abstract

<jats:p>This article presents selected aspects of an interlaminar shear strength and failure analysis of hybrid fiber metal laminates (FMLs) consisting of alternating layers of a 2024-T3 aluminium alloy and carbon fiber reinforced polymer. Particular attention is paid to the properties of the hybrid FMLs with an additional interlayer of glass composite at the metal-composite interface. The influence of hygrothermal conditioning, the interlaminar shear strength (short beam shear test), and the failure mode were investigated and discussed. It was found that fiber metal laminates can be classified as a material with significantly less adsorption than in the case of conventional composites. Introducing an additional layer of glass composite at the metal-composite interface and hygrothermal conditioning influence the decrease in the interlaminar shear strength. The major forms of damage to the laminates are delaminations in the layer of the carbon composite, at the metal-composite interface, and delaminations between the layers of glass and carbon composites.</jats:p>

Recovery and reuse of carbon fibre and acrylic resin from thermoplastic composites used in marine application

“…Concerning rCF based composites, around all samples seems to exhibit an interlaminar failure. A single or multiple sharp step drop in load-displacement curve confirm the fact that interlaminar shear failure is occurring rather than tensile or compression failure (Bieniaś et al, 2020). In addition, we performed calculations to ensure that at this load, the shear strength did not exceed bending strength.…”

Damage to inverse hybrid laminate structures: an analysis of shear strength test

“…They analyzed the effect of additional adhesive layers on the ILSS of laminates produced using a vacuum bag process, obtaining shear strengths of 39-49 MPa. The research carried out by Bieniaś et al [18] presented the ILSS values in the range of 81.5-93 MPa for CARALL laminates with classical Al/CFRP/Al ply arrangement, produced by the autoclave method, in which aluminum alloy layers were additionally subjected to chromic acid anodizing (CAA) and additional adhesive primer coating.…”

“…ILSS can be tested by a number of methods, including the double-notch shear (DNS) test [16] and the three-point-bending load short-beam shear (SBS) test [17]. The last of the enumerated methods is currently used as a standard ILSS test according to American Society for Testing and Materials (ASTM) D2344 [15] and Deutsches Institut für Normung (DIN; German Institute for Standardisation) Europaische Norm (EN; European standard) 2563 or similar, used for high-modulus reinforced composites (International Organization for Standardization [ISO] EN ISO14130 [18]. In addition to shear stress analysis, scanning electron microscopy (SEM) images of damaged specimens are scrutinized to determine the characteristics of damage resulting from the SBS [15] and DNS [19] tests.…”

Short-beam shear fatigue life assessment of thermally cycled carbon–aluminium laminates with protective glass interlayers

“…The used organic-inorganic hybrid sol-gel primer belonging to the second-generation coatings ensures a high corrosion resistance by creating a dense -Si-O-Si-network and providing high adhesion to metal surfaces, owing to the formation of covalent Me-O-Si bonds [38,39]. The observed increase of ILSS in Al/CFRP and the constant value of ILSS in Al/G/ CFRP after thermal shocks are probably due to the reaction between the metal, epoxy and primer, leading to an increase in bond strength in the interface area [40]. It should be also noted, that the formula used for the determination of ILSS is based on homogeneous beam theory, which predicts a continuous, parabolic distribution of the shear stress, with a maximum on the neutral plane of the laminated beams [41].…”