STUDI PERBANDINGAN PANJANG KRITIS PADA BEBERAPA MACAM SERAT ALAM DENGAN METODE PULL OUT FIBER TEST

The purpose of the research is to know the length of the critical comparison of: (1) Agave fiber, (2) Kenaf fiber, (3) Palm fiber, and (4) Coco fiber. This research conducted in the laboratory of materials in mechanical engineering Universitas Gajah Mada by using quantitative methods. Population in this research are a natural fiber. The sample used the technique purposive of sampling some 4 kinds of natural fibers. The research by using a agave fiber, palm fiber fiber, kenaf fiber, coco fiber, epoxy resins, and catalyst. The sample used piece from agave fibers, palm fiber, kenaf fiber, and coco fiber. To find the critical length of each fiber using the pull out of fiber test method. Testing critical length of fibers using fiber-universal test machine. The main material that is used in the form of agave fiber, coco fiber, palm fiber, kenaf fiber, pieces of pipe, epoxy resins and catalysts. Mixing resin epoxy with a catalyst using comparison 100 % : 1 % with 100 % of resins and 1 % of catalysts. The sample used are pieces of agave fiber, kenaf fiber, palm fiber and coco fiber. To find the critical length of each fiber by using pull out fiber test methods. Before the test with pull fiber test methods, fiber pull test single advance in search of single fiber tensile strength of each fiber. Testing critical fibre length by using the tool universal fiber test machine. The analysis of the data used is descriptive analysis. Based on the result of data analysis can conclude that: (1) Critical length of agave fiber is 9 mm; (2) Critical length of kenaf fiber is 36 mm; (3) Critical length of palm fiber is 11 mm; and (4) Critical length of coco fiber is 36 mm. Keywords: Natural fiber, agave fiber, kenaf fiber, coconut fiber, pull out of fiber tes