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2.4. Rule of Mixtures Rule of mixtures is a method of approach to approximate estimation of composite material properties, based on assumption that a composite property is the volume weighed average of the matrix properties. The properties of the composite largely depend on the length of individual fiber, fiber loading and orientation, level of mixing, fiber to matrix bonding and the arrangement of the fiber in the composite. Limitation of composite strength depending on the failure strain of the fiber [22]. The tensile properties of the composite can be estimated by the rule of mixtures as follow: σc = σmVm + σfVf ................... Equation 1 Ecl = EmVm + EfVf.................... Equation 2 where: σ = tensile strength Ecl = longitudinal modulus V = volume fraction c = composite m = matrix f = fiber By definition, composite material is a material in which two or more distinct materials are combined together but remain uniquely identifiable in the mixture. In composite, fiber acts as the reinforcement to support the structure. As shown in equation 2, the fiber and matrix (binder) are the components that contribute to the stiffness of composite. 7PDF Image | Woven Kenaf Reinforced High Density Polyethylene HDPE
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