Thermal Delamination Modelling and Evaluation of Aluminium–Glass Fibre-Reinforced Polymer Hybrid

Abstract

This paper aims to propose a temperature-dependent cohesive model to predict the delamination of dissimilar metal–composite material hybrid under Mode-I and Mode-II delamination. Commercial nonlinear finite element (FE) code LS-DYNA was used to simulate the material and cohesive model of hybrid aluminium–glass fibre-reinforced polymer (GFRP) laminate. For an accurate representation of the Mode-I and Mode-II delamination between aluminium and GFRP laminates, cohesive zone modelling with bilinear traction separation law was implemented. Cohesive zone properties at different temperatures were obtained by applying trends of experimental results from double cantilever beam and end notched flexural tests. Results from experimental tests were compared with simulation results at 30, 70 and 110 °C to verify the validity of the model. Mode-I and Mode-II FE models compared to experimental tests show a good correlation of 5.73% and 7.26% discrepancy, respectively. Crack front stress distribution at 30 °C is characterised by a smooth gradual decrease in Mode-I stress from the centre to the edge of the specimen. At 70 °C, the entire crack front reaches the maximum Mode-I stress with the exception of much lower stress build-up at the specimen’s edge. On the other hand, the Mode-II stress increases progressively from the centre to the edge at 30 °C. At 70 °C, uniform low stress is built up along the crack front with the exception of significantly higher stress concentrated only at the free edge. At 110 °C, the stress distribution for both modes transforms back to the similar profile, as observed in the 30 °C case.

Low-speed impact of glass/Kevlar hybrid composites: Experimental results and numerical verification

“…Compared with the experimental results of 107.79 J, the errors are 5.28% and 41.81% respectively. The failure mode of the 1 mm mesh size model is closer to the test, and Zhen et al 22 take the mesh as 0.8 mm when analyzing aluminum-glass fiber composite laminates at different temperatures, so the 1 mm mesh is recommended for finite element analysis. The initial impact head is 5 mm away from the test plate, and different initial velocities are given to the impact head to obtain different primary impact energy.…”

The effect of lamina configuration on low-velocity impact behaviour for glass fiber/rubber curved composites

“…The EN parameter was obtained by the ratio of the modulus of elasticity of the epoxy resin to the thickness of the resin. 25 Here, the modulus of elasticity of the epoxy resin was 3 GPa and the adhesive thickness was 0.371 mm. The XMU parameter was taken from the literature.…”

Deep Drawing Behaviour of Steel–Glass Fibre-Reinforced and Non-Reinforced Polyamide–Steel Sandwich Materials

“…The adhesion strength between the cover and core layers decreased sharply wit increasing temperature, as the higher temperatures increased the overall ductility o adhesive, making crack propagation much smoother [36]. The properties of the coh elements in this study were defined based on the results presented in previous st [37,38], in which the peak traction stresses in the normal and shear modes were red by 83 % each when the temperature increased from RT to 110 °C for an epoxy-base hesive. The aim was to replicate and validate the model, where after the deep-dra The adhesion strength between the cover and core layers decreased sharply with the increasing temperature, as the higher temperatures increased the overall ductility of the adhesive, making crack propagation much smoother [36].…”