Susilorini, Retno (2009) FRACTURE BASED APPROACH FOR FAILURE ANALYSIS OF NYLON 600 FIBER. In: Proceeding of the 11 th International Conference on QiR (Quality in Research). Faculty of Engineering, University of Indonesia.

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Abstract

The research purposes to implement fracture based approach in failure analysis of nylon 600 fiber and also partly embedded nylon 600 fiber in cementitious matrix. The methods are experiment and analytical by modeling. The experiment activities consist of tension test of nylon 600 fiber and pullout test of partly embedded nylon 600 fiber in cementitious matrix with length 150 mm and 180 mm. The research meets conclusions: (1) Whenever fracture takes place, it is always an unstable crack; (2) Stable cracks are established by the presence of crack arrester; (3) After the establishment of stable cracks, increasing strain beyond strain  1 will not increase stress  1 , hence do not induce additional fracture; (4) Increasing of strain   after the establishment of stable cracks in point g will increase stress, the second slip will not take place; (5) Broken nylon fibers have a longer embedded length because of the possibility of crack arrester presence is bigger than the shorter ones; and (6) Since the middle right side of matrix is at the intersection point with fiber acts as crack arrester in the beginning of pull-out process, then the load-displacement and stress-strain curves of pull-out test will be the same as the load-displacement and stress-strain curves of fiber tension test.

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