caracterización dinámico-mecánica de materiales biocompuestos reforzados con fibras de fique.

Abstract

In the following investigation, the mechanical and dynamic vibratory properties of bio composite materials reinforced with fique fibers were studied. The materials were fabricated trough a vacuum infusion manufacturing technique using a biobases and thermostable matrices and natural fiber reinforcements with random and weave configurations. Mechanical tensile properties were obtained according to ASTM D3039 / D3039M. The results demonstrated greater stiffness and strength to greater natural fiber amount also that the weave fique biocomposites exceed in their mechanical behavior random biocomposites. The impact on the modal parameters (Dynamic characterization) due to the natural fiber number layers was experimentally made according to ISO 7626-2. An increase in the materials natural frequency and damping with the fiber incorporation was identified. On the other hand, the deviation between three modal analysis methods (analytical, finite elements and experimental) applied to biocomposite materials was studied. obtaining low difference percentages comparing the last two mentioned methods while the experimental method reported errors until 25%. The interface between the materials was studied by scanning electron microscopy, in which a low adhesion between the natural fiber and the resin was evidenced affecting the mechanical and dynamic properties. The fique biocomposite tensile test, Modal analysis and scanning microscopic results obtained were compared against a referent fiberglass composite, which presented better mechanical properties, similar dynamic behavior and a better adhesion than the fique biocomposites.