Flexural Behavior of Functionally Graded Sandwich Composite

摘要: During World War II, the british made a bomber De Havilland Mosquito which served in Europe, Middle and Far East on Russian front. Designed as bomber, it excelled not only this field but also fighter aircraft, mine layer, path finder military transport photo reconnaissence. It was constructed during Battle of Britain first prototype its maiden flight november 1940, less than year after design project is started. From an engineering viewpoint, has one spectacular feature fuselage molded plywood-balsa sandwich material, strong yet lightweight equally important times war, components are readily available unlike aluminium ones. The importance war effort proved value new materials [1]. Sandwich composites popular due to high specific strength stiffness. concept sandwiches came early 1849 AD their potential realized mainly Second mentioned earlier. Sandwiches composed two stiff, thin faces (skins) bonded light, thick weaker core. Faces sustain in-plane bending loads, while core resist transverse shear forces keep facings place. These provide increased flexural rigidity by virtue geometry. stiffness make them ideal structural [2-3]. Developments aviation posed requirement lightweight, highly damage tolerant materials. composites, fulfilling these requirements became choice for many applications including ground marine vessels [4].