PENGARUH VARIASI KETEBALAN CORETERHADAPudKARAKTERISTIKBENDINGKOMPOSIT SANDWICH SERAT CANTULAudDENGAN CORE HONEYCOMB KARDUS TIPE KOMBINASIC-FLUTEudDAN A-FLUTE

摘要

Wirawan Yogi Panuti.THE EFFECT OF THE VARIATION OF COREudTHICKNESS ON BENDING CHARACTERISTIC OF CANTULAS’ FIBERudSANDWICH COMPOSITE WITH THE TYPE COMBINATION C-FLUTEudAND A-FLUTE OF CARDBOARD HONEYCOMB CORE.Thesis: Faculty ofudTeacher Training and Education Science Sebelas Maret University Surakarta,udOctober, 2013.udThe purpose of this research is to investigate the effect of the variation ofudcore thickness on strength bending characteristic of cantulas’ fiber sandwichudcomposite with the type combination C-Flute and A-Flute of cardboardudhoneycomb core.udCantulas’ fiber is used to make the skin by applied it in the same way andudget alkali ( 2% NaOH ) in 6 hours. Hand lay up method is used in the productionudprocess by using fraction 40:60 resin BQTN 157 with the thickness of skin 4mm.udin making the combination between C-Flute and A-Flute core honeycomb usedudHorisontal Gelombang Dua arah ( HGD ) method with the variation of the coreudthickness 10 mm, 20mm, and 40 mm. then , adhesive epoxy versamid 140 is usedudto glue between skin and core. the mechanical test is conducted using bendingudtest according to ASTM C 393 standart. the failure observation of the bendingudtest is done by makro photo.udThe result shows that the variation of core thickness influence the strengthudof bending sandwich cantulas’ fiber sandwich composite with the typeudcombination C-Flute and A-Flute of cardboard honeycomb core . the maximumudweight of the bending sandwich composite is in the 10mm of the core thicknessudwith the value 14,800MPa, on core shear stress and facing bending stress is inudthe 10mm of the core thickness with the value 0,634 MPa and 14,271 MPa. theudpattern of failure is in the core failure, delaminasi, deformasi and in the skin isudcauses of load tensile.udkeywords : sandwich composite, cantulas’ fiber, core thickness, bending,udcardboard type C-Flute and A-FluteudWirawanudYogiudPanuti.PENGARUHudVARIASIudKETEBALANudCORETERHADAP KARAKTERISTIK BENDINGKOMPOSIT SANDWICHudSERAT CANTULA DENGAN CORE HONEYCOMB KARDUS TIPEudKOMBINASIC-FLUTE DAN A-FLUTE. Skripsi, Fakultas Keguruan dan IlmuudPendidikan Universitas Sebelas Maret Surakarta.Oktober 2013.udTujuan penelitian ini adalah untuk mengetahui pengaruh ketebalan coreudterhadap kekuatan bending komposit sandwich serat cantula dengan coreudhoneycomb kardus tipe kombinasi C-Flute dan A-Flute.udBahan pembuatan skin menggunakan serat cantula dengan modeludpenempatan searah dan mendapatkan perlakuan alkali ( 2% NaOH ) selama 6 jamudkemudian proses cetak dengan metode hand lay up menggunakan fraksi 40 : 60udresin BQTN 157 dengan ketebalan skin 4 mm. Proses pembuatan core honeycombudkombinasi C-Flute dan A-Flute menggunakan arah susunan HorisontaludGelombang Dua arah (HGD) dengan variasi tebal core 10 mm, 20 mm, 30 mmuddan 40 mm kemudian perekat antara skin dan core memakai Adhesiveudepoxyversamid 140. Pengujian yang dilakukan adalah uji bending denganudmengacu pada standart ASTM C 393.Kegagalan uji bending dianalisis denganudmenggunakan foto makro.udHasil penelitian menunjukkan bahwa variasi ketebalan core berpengaruhudterhadap kekuatanbending komposit sandwich serat cantula dengan coreudhoneycomb kardus tipe kombinasi C-Flute dan A-Flute, dimana kekuatanudbendingtertinggi komposit sandwich berada pada ketebalan core 10 mm denganudnilai 14,800MPa kemudian core shear stress dan facing bending stress tertinggiudtetap pada ketebalan core 10 mm dengan nilai 0,634 MPa dan 14,271 MPa. Polaudkegagalan yang terjadi adalah gagal core, delaminasi, deformasi dan kegagalanudskin akibat beban tarik.udKata Kunci :komposit sandwich, serat cantula, ketebalan core, bendin, kardusudtipe C-Flute dan A-Flute