PENGARUH VARIASI ADHESIVE TERHADAP KEKUATAN MEKANIK KOMPOSIT SANDWICH CANTULA 3D-UPRs DENGAN CORE HONEYCOMB KARDUS C-FLUTE

The purpose of this research is to investigate the effect of adhesive variation on mechanical characteristics strength includes shear strength and flexural strength of UPRs Cantula 3D Sandwich Composite with C-Flute corrugated cardboard honeycomb core. Adhesive applied in this research was type of polyester such as 157 BQTN EX, LP 1Q EX, FW 21 EXL, and type of epoxy such as Versamid 140. Methode of hand lay up is used to make UPRs Cantula 3D with weight content 30 %. The mechanical test conducted are shear strength according to ASTM C 273 and flexural strength according to ASTM C 393. The observation to surface fracture from the specimen of flexural strength test is done by using SEM. The result shows that the adhesive variation influence on shear strength and flexural strength of UPRs Cantula 3D Sandwich Composite. The highest value reached by using adhesive Versamid 140 with 0,34 MPa on shear strength and 7,98 MPa on flexural strength. Observation of surface fracture from the specimen flexural strength shows that UPRs Cantula 3D Sandwich Composite with adhesive Versamid 140, have a little pull out and short fibre fracture. Keywords : sandwich composite, adhesive, shear strength, flexural strength, SEM