?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+FRAKSI+VOLUME+TERHADAP+KEKUATAN+TARIK%0D%0AKOMPOSIT+BERPENGUAT+SERAT+KULIT+BATANG+MELINJO%0D%0A(GNETUM+GNEMON)+-+RESIN+EPOXY&rft.creator=Ridho+Aritonang%2C+1015021071&rft.subject=Teknik+mesin+dan+mesin&rft.description=Seiring+dengan+perkembangan+teknologi+yang+semakin+pesat+mendorong%0D%0Abanyaknya+penemuan+beberapa+teknologi+alternatif+sebagai+cara+dalam+memenuhi%0D%0Akebutuhan+masyarakat.+Khususnya+pada+bahan+material%2C+bahan+material+yang%0D%0Adibutuhkan+adalah+bahan+material+yang+berkualitas+dan+memiliki+sifat+mekanik%0D%0Ayang+tinggi.+Komposit+merupakan+salah+satu+alternatif+untuk+menghasilkan%0D%0Amaterial+yang+dari+sifat+mekaniknya+lebih+baik+dari+material+lainnya.+Tujuan+dari%0D%0Apenelitian+ini+adalah+mengetahui+kekuatan+tarik+komposit+serat+kulit+pohon%0D%0Amelinjo+dengan+fraksi+volume+sebesar+5%25%2C+10%25%2C+dan+15%25.%0D%0ASerat+kulit+pohon+melinjo+digunakan+sebagai+bahan+pengisi+komposit%2C+karena%0D%0Aharganya+relatif+murah+dibandingkan+serat+sintetis.+Serat+yang+digunakan+sebagai%0D%0Apenguat+diberikan+perlakuan+alkali+NaOH+5%25+selama+2+jam.+Metode+yang%0D%0Adigunakan+dalam+pembuatan+adalah+metode+hand+lay-up+dengan+pencampuran%0D%0Aresin+epoxy+dan+hardener+dengan+perbandingan+campuran+1+%3A+1+mengacu+pada%0D%0AASTM+D638.+Selanjutnya+arah+serat+disusun+secara+acak+dengan+fraksi+volume%0D%0A5%25%2C+10%25%2C+dan+15%25.+Kemudian+dilakukan+pengujian+tarik+untuk+komposit+dengan%0D%0Afraksi+volume+5%25%2C+10%25%2C+15%25.+Photo+daerah+patahan+dengan+Scanning+Electron%0D%0AMicroscope+(SEM)+digunakan+untuk+melihat+mekanisme+perpatahan+komposit.%0D%0ADari+hasil+pengujian+dan+analisa+data+didapatkan+bahwa+kekuatan+tarik+komposit%0D%0Aserat+kulit+pohon+melinjo+15%25+lebih+tinggi+dibandingkan+dengan+fraksi+volume%0D%0A10%25+dan+5%25%2C+dengan+kekuatan+tarik+sebesar+15.99+MPa+dan+regangan+sebesar%0D%0A4.433%25.+Analisa+data+menggunakan+pengamatan+SEM+pada+penampang+patahan%2C%0D%0Adapat+diketahui+kegagalan+dari+komposit+berupa+fiber+pullout%2C+matrik+cracking%2C%0D%0Afiber+breaking%2C+dan+bekas+pullout+.+Dari+analisa+data%2C+diketahui+bahwa+semakin%0D%0Abanyak+fraksi+volume+maka+semakin+tinggi+kekuatan+tariknya.+Hal+ini%0D%0Amenunjukan+bahwa+daya+ikat+antara+matrik+dan+serat+yang+cukup+baik%2C+tetapi%0D%0Asebaran+serat+pada+matrik+tidak+merata+yang+mengakibatkan+kekuatan+tarik%0D%0Akomposit+yang+optimal+tidak+bisa+dicapai.%0D%0AKata+kunci+%3A+komposit%2C+serat+kulit+pohon+melinjo%2C+resin+epoxy%2C+kekuatan+tarik%2C%0D%0ASEM.%0D%0A%0D%0A%0D%0AAbstrak+Bahasa+Inggris%0D%0A%0D%0ABast+fibers+melinjo+is+a+natural+fiber+derived+from+trees+melinjo%2C+and+can+be%0D%0Adegraded+naturally+and+cheaper+than+synthetic+fibers.+Composite+is+one+alternative%0D%0Ato+produce+a+material+of+better+mechanical+properties+than+other+materials.+The%0D%0Aaim+of+this+study+was+to+determine+the+tensile+strength+fiber+composite+melinjo%0D%0Atree+bark+with+a+volume+fraction+of+5%25%2C+10%25+and+15%25.%0D%0AMelinjo+bast+fibers+are+used+as+filler+composites%2C+because+the+price+is+relatively%0D%0Acheap+compared+to+synthetic+fibers.+Fibers+used+as+reinforcement+given+5%25+NaOH%0D%0Aalkaline+treatment+for+2+hours.+The+method+used+in+the+making+is+a+method+of+hand%0D%0Alay-up+by+mixing+epoxy+resin+and+hardener+in+the+ratio+1%3A+1+mixture+refers+to%0D%0AASTM+D638.+Furthermore%2C+the+direction+of+fibers+arranged+randomly+with+a%0D%0Avolume+fraction+of+5%25%2C+10%25+and+15%25.+Then+do+the+tensile+test+for+composites%0D%0Awith+a+volume+fraction+of+5%25%2C+10%25%2C+15%25.+Photo+regions+fault+with+Scanning%0D%0AElectron+Microscope+(SEM)+is+used+to+see+the+fracture+mechanics+of+composites.%0D%0AFrom+the+test+results+and+analysis+of+data+showed+that+the+tensile+strength%0D%0Acomposite+bast+fibers+melinjo+15%25+higher+than+the+volume+fraction+of+10%25+and%0D%0A5%25%2C+with+a+tensile+strength+of+15.99+MPa+and+the+strain+of+4433%25.+Analysis+of%0D%0Adata+using+observations+SEM+in+cross+fault%2C+can+know+the+failure+of+composites%0D%0Asuch+as+fiber+pullout%2C+matrix+cracking%2C+fiber+breaking%2C+and+the+former+pullout.%0D%0AFrom+the+data+analysis%2C+it+is+known+that+the+more+the+volume+fraction%2C+the+higher%0D%0Athe+tensile+strength.+This+shows+that+the+connective+power+between+the+matrix+and%0D%0Afiber+are+quite+good%2C+but+the+distribution+of+fibers+in+the+matrix+is+uneven+resulting%0D%0Ain+optimum+composite+tensile+strength+can+not+be+achieved.%0D%0AKeywords%3A+composite%2C+melinjo+bast+fibers%2C+epoxy+resin%2C+tensile+strength%2C+SEM.&rft.publisher=FAKULTAS+TEKNIK&rft.date=2015-10-23&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14892%2F1%2FABSTRACT.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14892%2F2%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14892%2F3%2FCOVER%2520DALAM.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id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