Levantamento das propriedades mecânicas de compósitos de matriz termoplástica reforçados com fibras longas de bambu pela análise de distribuição estatística de Weibull

Abstract

In the present days there are a search for materials that are environmentally responsible therefore have a low cost, good mechanical strength and use a raw material biodegradable and renewable. The composites reinforced with natural fibers are a way out of this problem. Bamboo fibers are highly resistant to traction and can be drawn as long fibers, such as sisal fibers. What makes them ideal for natural reinforcements for composites. This article presents a statistical way to get the mechanical properties of materials, which are not very constant properties within the material, which is the case. We use a statistical tool called Weibull distribution, this distribution as well failure provides multiple physical systems, in which brittle fracture is located. Applying it to this method on the results of uni-axial tensile tests of composites reinforced with bamboo fibers to survey the mechanical properties, performed in accordance with ASTM D3039 in this work were used virgin and recycled polypropylene for the manufacture of composites. As observed in many other works the Weibull distribution very well could provide an average for the mechanical properties of the composite material.