Abstract
Fiber metal laminates (FMLs) are a modern group of hybrid composites consisting of metal sheets and layers of polymer composite reinforced with fiber. Desirable properties are being get throuwegh the selection of components and the configuration of layers. Nowadays, aluminum/glass fiber epoxy composite laminates type glass reinforced are most popular, but other metallic and fiber composite materials as components are widely examined. The adhesion of these components is achieved in manufacturing process during curing in autoclave or in vacuum bag using out-of-autoclave method. The metal layers are specially pretreated before the process of bonding with fibers/epoxy prepreg. A pretreatment is essential to promote one or several of the adhesion mechanisms (i.e., mechanical interlocking, physisorption, chemisorption) both improving the strength of the adhesive joint. The quality of FML depends on macrostructure and microstructure of composite—voids presence and their size, fiber distribution, and cohesion of plies; microstructure, topography, and the physical and chemical properties of metal surface; microstructure of interface—especially presence of delamination. Therefore, the macro- and microstructure characterization is very important as the first step for predicting the properties of FMLs.
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