Resumo

GOMEZ, S.A.; RAMON, B. A.  e  GUZMAN, R. E.. Bioepoxy resin/fique fiber composite modal analysys. Entre Ciencia e Ingenieria [online]. 2018, vol.12, n.23, pp.78-83. ISSN 1909-8367.  https://doi.org/10.31908/19098367.3706.

In this work, a modal analysis was applied on a bioepoxy/ fiber composite material using the simulation (Finite Elements), experimentation and analytical modeling knowing the deviation between each of the methods of the solution. The material was elaborated using a bioepoxy resin and fique fibers in the distribution of weave under the technique of manufacturing the infusion vacuum. Tensile tests were performed on the composite material according to ASTM D3039 / D3039M to obtain the mechanical properties that allow the development of the mathematical model and the simulation and analysis of scanning electron microscopy to observe the adhesion between the fiber and the matrix. The experimental modal analysis was performed by measuring the frequency response (FRF) under ISO 7626-2. The Euler-Bernoulli equation was used for analytical modeling, while the ANSYS finite element software was used for the simulation. It concludes that for the first modes of material vibration obtained results close between the three methods, however for the third mode the error increases by the interaction between the matrix and the fiber and the effects of the rotation of the cross-section of the test item.

Palavras-chave : Modal analysis; bioepoxy; composite; finite elements; Euler-Bernoulli; fique; frequency response measurement.

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