Estimation of compression and shrinkage properties of Brazilian tropical timber through porosimetry analysis by mercury intrusion

• Published in: Bioresources 2022-02, Vol.17 (1), p.519-526
• Main Authors: Almeida, Andréa de Souza, Criscuolo, Gabriel, Arroyo, Felipe Nascimento, Aquino, Vinícius Borges de Moura, Silva, Diogo Aparecido Lopes, Molina, Júlio Cesar, Chahud, Eduardo, Branco, Luiz Antonio Melgaço Nunes, Christoforo, André Luis, Lahr, Francisco Antonio Rocco
• Format: Article
• Language: English
• Subjects: Compression; Contact angle; Density; Empirical equations; Independent variables; Mechanical properties; Mercury; Modulus of elasticity; Moisture content; Multiple regression models; Porosity; Regression analysis; Statistical analysis; Tropical forests; Variables; Variance analysis
• ISSN: 1930-2126; 1930-2126
• DOI: 10.15376/biores.17.1.519-526

Wood is a natural material with properties that are strongly influenced by anatomical characteristics, so studies that aim to correlate properties through empirical equations in search of simplification to obtain the values of their characteristics are essential. In this context, this work aims to generate multiple regression models to estimate the properties of shrinkage and compression parallel and normal to the grain of Brazilian tropical woods as a function of the values of porosity, density, and for both properties, with porosity being obtained by mercury intrusion porosimetry. As a result, the radial (RRT) and total tangential (RTT) shrinkage could be estimated through porosity. However, it was not possible to estimate them considering only density as an independent variable. All the models that were used were able to accurately estimate the modulus of resistance and modulus of elasticity values (fc,0, Ec,0, fc,90, and Ec,90).