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Diameter dependence of tensile strength by Weibull analysis: Part III sisal fiber

By W.P. Inacio, F.P.D. Lopes and S.N. Monteiro


Environmental aspects and economical advantages are motivating the use of natural fiber as reinforcement of polymer composites in substitution for synthetic fiber composites such as fiber glass. In particular, the sisal fiber is one of the most investigated and being used in engineering systems. By contrast to synthetic fibers, natural fibers have the disadvantage of being heterogeneous in their dimensions specially the diameter. In several natural fibers it has been found that the smaller the diameter, the stronger is the fiber. In this work a Weibull analysis of sisal fibers tensile strength was performed to find a correlation with the diameter. The results revealed an inverse dependence of the tensile strength with the diameter. The observation of ruptured fibers by scanning electron microscopy suggested possible mechanisms that justify a hyperbolic correlation

Topics: Sisal fiber, Weibull analysis, tensile test, fracture observation
Publisher: Rede Latino-Americana de Materiais
Year: 2010
DOI identifier: 10.1590/s1517-70762010000200006
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