كليدواژه :
مهندسي , Counter Cure , ساختارهاي ساندويچي فنولي , Co-cure , پخت همزمان
چكيده لاتين :
A sandwich structure must have thin, dense, high strength facings, a low density core, which is usually thick, relatively weak, a rigid and strong attachment between them. Sandwich structures are being increasingly used in aerospace, buildings, and automotive industries, because they have high specific strength, stiffness, good thermal and acoustical insulation properties. Because of potentially low cost and high thermal resistance of phenolic resins they are attractive for using as the matrix in the facings and the core materials. Having a little knowledge of the manufacturing of phenolic sandwich structures, in this research we have manufactured sandwich panels by compression molding employing two alternative methods: Co-cure and counter cure processes. In a co-cure process, the core and composite skins cured simultaneously but, in counter cure process the core with certain density and thickness are first prepared and cured with the skins as the second stage. The influence of the selected process on the flexural properties of the sandwich panels has been experimentally investigated, leading to the identification of the preferred processing conditions.
