Abstract

Fiber metal laminates (FMLs) are the assembly of composite materials and metallic sheets in an alternating arrangement. In this paper, mechanical performance and failure mechanisms of Carbon fiber-reinforced epoxy/Aluminum Laminates (CARALL) under three-point bending were investigated via experimental and numerical methods. A series of three-point bending tests are conducted to study the bending behavior of different CARALLs under fiber reinforced plastic composite/metal alternative stacking sequence. Results indicates that a comparatively high stiffness (109.70 GPa) and strength (1673 MPa) of 3/2 (3 aluminum sheets and 2 carbon fiber/epoxy laminates) FMLs are achieved in comparison to other stacking sequence of FMLs. With the increase of metal volume fraction, the bending properties are weakened, suggesting the carbon fiber composite layers play important roles in load bearing. Furthermore, bending properties and damage behavior of two fiber orientations (unidirectional and cross-ply) in 3/2-FMLs are investigated by Linde failure criterion, which is in agreement with the experimental load–deflection curves and microstructural analysis.

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