Silva, Leandro J.Panzera, Túlio HallakChristoforo, André LuisDurão, Luís M.Lahr, Francisco Antonio Rocco2014-03-062014-03-0620122166-53892166-5400http://hdl.handle.net/10400.22/4148n the last decades the biocomposites have been widely used in the construction, automobile and aerospace industries. Not only the interface transition zone (ITZ) but also the heterogeneity of natural fibres affects the mechanical behaviour of these composites. This work focuses on the numerical and experimental analyses of a polymeric composite fabricated with epoxy resin and unidirectional sisal and banana fibres. A three-dimensional model was set to analyze the composites using the elastic properties of the individual phases. In addition, a two-dimensional model was set taking into account the effective composite properties obtained by micromechanical models. A tensile testing was performed to validate the numerical analyses and evaluating the interface condition of the constitutive phases.engNatural compositesSisal fibresBanana fibresFinite element analysisjournal article10.5923/j.ijme.20120204.03