Avaliação das propriedades físicas e mecânicas da madeira de duas espécies nativas da Amazônia

Abstract

The objective of this work was to evaluate the physical and mechanical properties of the wood of two native Amazonian species, Handroanthus sp. (Ipê-yellow) and Astronium lecointei Ducke (muiracatiara), as well as the use of an ultrasonic method in the determination of elasticity and rupture modulus. The physical properties evaluated were: moisture content, basic specific mass, porosity, fiber saturation point (PSF), shrinkability, contraction and swelling. The mechanics were: parallel compression, perpendicular compression, static flexion; And modulus of elasticity (MOE), obtained by the universal machine of mechanical tests, and dynamic modulus of elasticity (Emd), obtained by ultrasound. The results of both species were submitted to analysis of variance and compared by the Tukey test at 5% of probability. Regarding the mechanical properties, the yellow iip presented superior results when compared to muiracatiara, with the highest values of resistance. Regarding the physical properties, muiracatiara presented better dimensional stability. The ultrasound method showed high correlation with the MOR and MOE of both species.