ANALISIS KEKUATAN MATERIAL KOMPOSIT POLYESTER BERPENGUAT SERAT SISAL DAN SERBUK KAYU MAHONI DENGAN VARIASI FRAKSI VOLUME MATRIKS DAN REINFORCEMENT

Ahdiat Fakhrudi, Yoga
Basuki, Imam
Ulum, Miftahul

JURNAL CRANKSHAFT
Vol. 9 No. 1 (2026)

The purpose of this study is to examine how changing the volume percentage of sisal fiber and mahogany wood powder composites can improve their mechanical qualities. The hand lay-up method was used to create composites with a set resin volume fraction of 50% and varying volume fractions of sisal fiber and mahogany sawdust (30%:20%, 35%:15%, 40%:10%, 45%:5%, and 50%:0%). The tensile test (ASTM D638), bending test (ASTM D790), and impact test (ISO 179-1) were among the tests. According to the results, the best impact toughness (70.34 KJ/mm²) was achieved with a combination of 45% fiber and 5% powder. The composition with the maximum tensile strength (23.36 MPa), strain (0.041%), and elastic modulus (574.20 Pa) was 40% fiber and 10% powder; the composition with the highest bending strength (124.50 N/mm²) was 50% fiber and 0% powder. The best composition from the impact test—45% fiber and 5% powder—is used in this study's rearview mirror cover product.