Strength Analysis of a Rib-Stiffened GLARE-Based Thin-Walled Structure

Abstract

<jats:p>This paper presents a new product, a glass laminate aluminium-reinforced epoxy (GLARE)-based thin-walled structure with a stiffener in the form of a longitudinal rib. The stiffening rib in an outer metallic layer of a GLARE-based panel was fabricated by the incremental sheet forming technique and Alclad 2024-T3 aluminium alloy sheets were used as adherends. The strength properties of the adhesive joint between the layers of the fibre metal laminates (FMLs) were determined in a uniaxial tensile test, peel drum test, tensile/shear test and short-beam three-point-bending test. Two variants of FMLs were considered, with an adhesive film and without an adhesive film between the adherends and the epoxy/glass prepreg. The FMLs were tested at three different temperatures that corresponded to those found under real aircraft operating conditions, i.e., −60 °C, room temperature and +80 °C. It was found that the temperatures do not affect the tensile strength and shear strength of the FMLs tested. However, there was a noticeable increase in the stiffness of samples stretched at reduced temperature. An additional adhesive film layer between the adherends and the glass/epoxy prepreg significantly improves the static peeling strength of the joint both at reduced and at elevated temperatures. A clear increase in the critical force at which buckling occurs has been clearly demonstrated in the uniaxial compression test of GLARE-based rib-stiffened panels. In the case of GLARE-based rib-stiffened panels, the critical force averaged 15,370 N, while for the non-embossed variant, it was 11,430 N, which translates into a 34.5% increase in critical force.</jats:p>

Contributions of interfaces on the mechanical behavior of 3D printed continuous fiber reinforced composites

“…However, the forces for the PA-PA interface dropped suddenly after 20 mm displacement. The average peel loads were determined along 100 mm peeling lengths ranging from 20 mm to 120 mm, discarding the first 20 mm displacement (except for the PA-PA interface) [34,35]. According to this method, as seen in Fig.…”

Progressive Damage Behaviour Analysis and Comparison with 2D/3D Hashin Failure Models on Carbon Fibre–Reinforced Aluminium Laminates

“…Research shows that the adhesive film can effectively reduce the electrochemical corrosion of the Al plate and CFRP layer [ 11 , 13 , 14 , 15 , 16 ]. The additional epoxy adhesive film interlayer can significantly improve the shear strength of laminates [ 17 , 18 ].…”

Numerical Shear Buckling Investigation of GLAREs with Initial Delamination

“…Several studies have already been carried out to determine the novel properties of FMLs [10][11][12][13][14][15]. Besides, many researchers have directed their e orts toward overcoming the weaknesses and limitations of this material [16][17][18][19][20]. To increase the performance of FMLs, it is necessary to recognize their failure mechanisms under different loading conditions.…”