Determination of mechanical properties of the palma de lata via tensile and shear tests ; Determinación de propiedades mecánicas de la corteza de la palma de lata por medio de ensayos de tracción y cortante

In this paper the process of characterization of the crust of the “palma de lata” (Bactrisguineensis) through the realization of tests based on the ASTM regulations is shown.The method by which the samples are extracted from the crust via longitudinal slicesis described, also the tests and the obtained properties like elasticity modulus, shearmodulus and Poisson coefficients are defined to describe the mechanical behavior ofthe palm. The results are analyzed and compared with similar woods to finally derive inconclusions and give recommendations for future investigations.The “Palma de lata” has been used mainly as construction material, its applicationsrange from ceiling cover to wall reinforcement in houses nearby from rivers in sometropical zones of Colombia, however, in spite of the reduced current applications forthis palm the crust possess interesting properties worth studying.The symbols used in this article are:σ = Magnitude of the normal stress Magnitude of shear stressG = Shear modulus= Angular deformation= Poisson’s ratiov = Magnitude in the tangential directiont = Magnitude in the radial directionl = Magnitude in the longitudinal directiontr = Magnitude applied in directed totr = Magnitude applied in directedlt = Magnitude applied in directed to## = Position of a constant inside a matrixSij = Compliance matrixCij = Stiffness matrixE = Elasticity modulusε = deformation per unit length ; En este trabajo se muestra el proceso de caracterización mecánica de la corteza de lapalma de lata (Bactris guineensis) a través de la realización de ensayos con base ennormas ASTM. Se muestra la forma en que se extraen las probetas desde la cortezapor medio de cortes longitudinales, también se describen los ensayos realizados y laspropiedades obtenidas como módulos de elasticidad, módulos de cortante y coeficientesde Poisson en aras de describir el comportamiento mecánico de la palma.Los resultados obtenidos son analizados y comparados con resultados de maderassimilares para finalmente derivar en conclusiones y brindar ...