Susilorini, Retno (2008) MODEL CABUT.SERAT NYLON 600 TERTANAM DALAM MATRIKS SEMENTITIS BERBASIS FRAKTUR. Jurnal llmiah Semesia Teknika, 11 (1).

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Abstract

The fracture mechanics is lonwn as a fracture based approach to prohibit a. catastrophic failure of structure. In micro scale field, the fracture mechanics is implemented especially to determine the performance of interface between fiber and cementitious matrix in fiber-reinforced cementitious composite'. The studies and applications of nylon clearly define the advance characteristic of nylon may influence the overall performance of composites and become a crucial issue to be Iearned, therefore, this paper forwards a fractured based pull-out model of short nylon 600 embedded in cementitious matrix with main concern on fracture phenomenon. The research applies experiment that applies pull-out test with embedded nylon 600 in cementitious matrixand the analytical method that constructs the fractured based pull-out model. The experiment results show the specimens with pull-outfbers have embedded length 11.: 30-60 mm and the broken fibers lf : 70-100 mm. The pull-out test also shows several stages: (a) Pre-slip stage, (b) Slip stage, and (c) Strain-hardening stage. The modelfits to experimenta! results. Several theories meet conclusions: (a) Wenever fracture takes piace, it k always an unstable crack, (b) Stable cracks are established by the presence of crack arrester, (c) There is no way directly to determine the length of stable crack, but it still can be determined byfractured based approach, (d) The length of stable crack is determined by the position of crack arrester, (e) There is an equation derived for pull-out model fi There is an equation to determine the stable crack length, (g) Stable craclu may be used to determined the bond capacity, (h) After the establishment of stable cracl<s, increasing strain beyond strain Qwill not increase stress 61 hence do not induce additional fracture, (i) Increasing of strain E ofier the establishment of stable cracks will increase stress 6, then the second slip *ill not take place, (il Broken nylonfibers have a longer embedded length because of the possibility ofcrack arrester presence is bigger than the shorter ones.

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