Adhesive Chemistry Reflection

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In this experiment the adhesive fillet formation and adhesive mechanical strength are evaluated as a function of several different design variables. Aluminum and Nomex honeycomb core are considered to study the effect of core cell size and core material. The variables of the study are: • Thickness of the adhesive film. • Reticulation process of the adhesive. A crosslinking reaction that involves the formation of a three dimensional network formed by the union of the different homogeneous polymer chains within a polymer. The mechanical performance of any sandwich panel depends on the quality of the core-face sheet adhesive bond, in addition, the structural strength depends on the formation of a fillet at the interface. It has been discovered that the fillets are an important factor in the ratio between the fracture toughness of a sandwich panel and the fracture toughness of a laminate of the same material. Large resin fillets absorb a considerable amount of energy before fracture, causing the value of fracture toughness to increase. Material and process variables include core cell size, core material type, adhesive thickness and the reticulation of the film adhesive. The effect of these variables on the fillet formation and the flatwise tensile (FWT) strength is studied. The process of the reticulation involves perforating and depositing the FM_ 300-2U adhesive film on cell walls of a honeycomb core without leaving the adhesive elsewhere. Two different adhesive film

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