Fabrication of fiber metal laminated composites by resin infusion technique using metallic layers with modified surface /

Daloğlu, Güney
Fiber metal laminated composites are novel materials which have been developed in the last few decades especially for fatigue prone areas within the aircrafts. They consist of metals with modified surfaces and fiber reinforced polymer matrix composites. Surface modification of metals carries importance because their bonding with fiber-resin matrix needs interdisciplinary knowledge about interface engineering. Surface of the metal substrates must be contaminant and moisture free and void content through interfaces of the final composite must be as low as possible to reach the desired mechanical strength. So, wetting of the liquid/resin and wettability capability of the solid/metal surface must be optimized. Different surface modifications like etching, anodizing, plasma spraying, laser texturing, silane or sol-gel etc. treatments are being used solely or together by industry. Fiber metal laminated composites have been investigated under the scope of etching-anodizing surface pretreatment with adhesive primer and fabricated with prepreg-autoclave manufacturing technique which are long-batch and expensive techniques while they are also hazardous. Within this study, surface treatments of aluminum 2024 T3 alloy based on sand paper abrasion and γ-glycidoxytrimethoxy silane treatment and fabrication of the fiber metal laminated composites by vacuum infusion manufacturing technique have been studied. The stress-strain and load-displacement relations and interface on both sides of composites have been investigated in relation with the surface roughness-contact angle-spreading capability controlled by the surface treatments applied. Achieved results have shown that vacuum infusion is a successful alternative technique for the fabrication of fiber metal laminated compositesi.