PENGARUH VARIASI FRAKSI VOLUME SKIN SERAT AREN DENGAN CORE LIMBAH GERGAJI KAYU SENGON LAUT TERHADAP KEKUATAN BENDING KOMPOSIT SANDWICH DENGAN MATRIX POLYESTER

WICAKSONO, BAGUS (2019) PENGARUH VARIASI FRAKSI VOLUME SKIN SERAT AREN DENGAN CORE LIMBAH GERGAJI KAYU SENGON LAUT TERHADAP KEKUATAN BENDING KOMPOSIT SANDWICH DENGAN MATRIX POLYESTER. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Sandwich composite is a type of composite that has a high strength when used as a primary or secondary structure. Composites also have advantages from its mechanical properties, corrosion resistance, small density and a relative simple manufacturing process. This study aimed to investigate the effect of volume fraction variations at sugar palm tree fiber skin and ‘sengon laut’ wood saw waste core on the bend strength sandwich composite with polyester matrix. The materials of this study were sugar palm tree fiber, unsaturated polyester resin 157 BQTN-EX, ‘sengon laut’ wood saw waste and urea formaldehyde. This specimen was made by press printing method with 2 mm skin thickness and 10 mm core thickness. This sandwich composite bending test refers to ASTM standard D-790-03. The method used in the composite manufacturing process was hand lay-up method. The results of this study showed that bending strength increased from volume fraction 20%:80% variations to volume fraction of 40%:60% variations, with the highest maximum stress value of 54,87 N/mm 2 was at 40%:60% variations. Based on this, it could be concluded that the addition of fiber affects the value of the bending strength. The result from morphology test shown that void was found at the specimen surface at 30%:70% variation which could happen because of the imperfection manufacture process and human error

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