Determination of the longitudinal modulus of elasticity in structural sawn wooden beams by the least squares method

• Autor(a) principal: Christoforo, André Luis
• Data de Publicação: 2012
• Outros Autores: Ribeiro Filho, Sérgio Luiz Moni, Wolensky, Anderson Renato Vobornik, Monteiro, Anelize Borges, Rocco Lahr, Francisco Antonio, Demarzo, Mauro Augusto
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Vértices (Campos dos Goitacazes. Online)
• Texto Completo: https://editoraessentia.iff.edu.br/index.php/vertices/article/view/1809-2667.20120032
• topic: Sawn wood; Modulus of elasticity; Least Squares Method; Madeira serrada; Módulo de elasticidade; Método dos Mínimos Quadrados

This paper proposes an alternative method of calculation based on the Least Squares Method to determine the longitudinal modulus of elasticity in structural-sized wooden beams. The developed equations require knowledge of three points of displacements, allowing greater reliability on the dependent variable when using the static four-point bending test. Using the Jatobá (Hymenaea sp) wood in the study, the methodology proposed here was used in combination with a simplified one, requiring knowledge of displacement only at the midpoint of the beam in order to compare the results among them. Results show statistical equivalence between the models, indicating a good approximation of the simplified model for calculating the modulus of elasticity in wooden structural bending here evaluated.