Experimental investigation on the inter-laminar strength in a hybrid elastomer modified fiber metal laminate under high and low velocity impact and quasi-static bending

Growing the need to impact resistive structures, hybrid laminates have been absorbed much attention. To reach appropriate strength, high stiffness and good energy absorption, the interfacial adhesion between different layers is important. The present paper is an attempt to assess the adhesion between different layers in a hybrid laminate consists of natural rubber, glass/epoxy composite and two layers of aluminum under high and low velocity impact and quasi static three-point bending conditions. In order to minimize the debonding, three kinds of specimens were made by three different adhesives including Chemosil 222 and its primer, Bylamet S2 and Cyanoacrylate. High and low velocity impact tests were carried out by a gas gun and drop hammer apparatus using a 10 millimeter hemispherical striker. Finally, quasi-static three-point bending tests were accomplished by a universal tension/compression apparatus. Damage and failure mechanisms and mechanical properties of the samples were studied and the best adhesive for each interface was determined. The results showed a better performance of Bylamet S2 adhesive in almost all types of loadings.