PEMBUATAN DAN KARAKTERISASI TEKAN DAN IMPAK KOMPOSIT HYBRID SERAT IJUK ACAK/SERAT GELAS ANYAM BERMATRIKS EPOKSI
Abstract
The application of advanced materials has been facing many problems, as follows limitation at supplies, high cost manufacturing, environment impact and difficult to decompose. Therefore, it need new materials that can be made in accordance with the requirement. The aims of this study is to determine the number of glass fiber layers on compressive and impact properties of randomly oriented palm fiber /wofen glassfiber hybrid-reinfored epoxy of composites.
The hybrid composition of random ijuk and woven glass fiber reinforced epoxy matrix was produced by press mold technique. The test specimen was made according to the ASTM D3410 standard for compressive and ASTM D256 standard for impact specimens. The fiber volume fraction ratio was 0.40 with five glass fiber layer variations, including: zero-layered, 1-layered, 2-layered, 3-layered, and 4-layered of glass fiber for both compressive and impact test.
The highest compressive strength was obtained at the 4-layered glass fiber variation, which is 29,796 MPa, while the lowest compressive strength was found at the zero-layered glass fiber variation, which is 18,861 MPa. The highest compressive strain was found at the 1-layered fiber glass variation, which is 0,464 mm/mm, while the lowest one is 0,311 mm/mm as found at the zero-layered variation. The highest compressive elastic modulus was obtained on the 4-layered glass fiber variation, which is 2875,55 MPa, while the lowest one was found on the zero-layered glass fiber variation, which is 915,015 MPa. From the impact test, it is shown that the glass fiber variation tends to improve the impact toughness. The highest impact toughness was found at the 3-layered fiber glass variation, which is 0,1008 J/mm2 but it goes down to 0,882 J/mm2 at the 4-layered fiber glass variation. This is proving that the optimum composite impact toughness was obtained on the 3-layered fiber glass.