KEKUATAN BENDING KOMPOSIT HIBRID SANDWICH KOMBINASI SERAT KENAF DAN SERAT GELAS DENGAN CORE KAYU SENGON LAUT

Kuncoro Diharjo

Abstract


The objective of this research is to investigate the ending strength characteristic of hybrid sandwich composites reinforced by woven roving kenaf and random glass fiber using sengon laut wood core. The used resin is unsaturated polyester 268 BQTN. The core is designed by cutting on cross section of the wood and treated by 5% borax solution. There are two kinds of sandwich composites, i.e. GFRP and hybrid sandwich composites, made by hand lay up method. The bending test method of the specimens is three point bending. The re t shows that the bending strength of hybrid sandwich composites (97.50 MPa) is .93% higher than GRFP sandwich composites (87.89 MPa). Similarly, the strength of the sandwich composites is higher than the strength of its components too. The racture surfaces indicate that the skin composite suffering tension stress failed at e first, and than the core was broken.


Keywords


sandwich composites, bending strength, kenaf fiber

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