PENGARUH VARIASI FRAKSI VOLUME KOMPOSIT SERAT RAMI BAMBU APUS BERMATRIK RESIN POLYESTER TERHADAP KUAT UJI TARIK SKRIPSI

Tata Nurhuda; hendi saryanto;

Pengaruh Variasi Fraksi Volume Komposit Serat Rami Bambu Apus
Bermatrik Resin Polyester Terhadap Kuat Uji Tarik
Tata Nurhuda

Kemajuan teknologi mendorong berbagai inovasi di bidang material, termasuk kebutuhan material
yang kuat dan ringan di sektor otomotif. Material komposit menjadi solusi dengan sifat mekanik
spesifik tinggi, tahan korosi, dan kepadatan rendah. Indonesia memiliki sumber daya bambu yang
melimpah, yang potensinya dapat dimaksimalkan untuk mendukung pertumbuhan ekonomi. Serat
alam, termasuk bambu, memiliki keunggulan berupa biaya rendah dan sifat yang ramah lingkungan,
meskipun memiliki kelemahan seperti kadar gula tinggi. Penelitian ini mengeksplorasi pengaruh
variasi fraksi volume serat rami bambu apus (0%, 25%, 50%, dan 75%) bermatriks resin polyester
terhadap kekuatan tarik. Pembuatan spesimen menggunakan metode hand lay-up dengan
perendaman alkalisasi 5% selama 2 hingga 3 jam. Hasil pengujian menunjukkan fraksi volume 75%
serat menghasilkan kekuatan tarik tertinggi sebesar 70,06 N/mm2 dengan regangan maksimum
5,91%. Analisis SEM menunjukkan peningkatan distribusi serat dalam matriks, meski disertai
porositas yang memerlukan kontrol fabrikasi lebih baik.
Kata Kunci: Komposit, Serat Rami Bambu Apus, Resin Polyester, Kekuatan Tarik, SEM

The Effect of Variation in the Volume Fraction of Apus Bamboo Ramie Fiber
Composite with Polyester Resin Matrix on Tensile Strength
Tata Nurhuda

Technological advances drive various innovations in the field of materials, including the need for
strong and lightweight materials in the automotive sector. Composite materials are a solution with
high specific mechanical properties, corrosion resistance, and low density. Indonesia has abundant
bamboo resources, the potential of which can be maximized to support economic growth. Natural
fibers, including bamboo, have the advantages of low cost and environmentally friendly properties,
although they have disadvantages such as high sugar content. This study explores the effect of
variations in the volume fraction of apus bamboo ramie fiber (0%, 25%, 50%, and 75%) in a
polyester resin matrix on tensile strength. The specimens were made using the hand lay-up method
with 5% alkalization immersion for 2 to 3 hours. The test results showed that the 75% fiber volume
fraction produced the highest tensile strength of 70.06 N/mm2 with a maximum strain of 5.91%. SEM
analysis showed an increase in fiber distribution in the matrix, although accompanied by porosity
that requires better fabrication control.
Keywords: Composite, Bamboo Ramie Fiber, Polyester Resin, Tensile Strength, SEM