Stress distribution in tauari wood beam

• Autor(a) principal: Paulo Ricardo Santos Coimbra
• Data de Publicação: 2018
• Outros Autores: Andréa de Souza Almeida, Tiago Hendrigo de Almeida, Diego Henrique de Almeida, Eduardo Chahud, André Luis Christoforo, Francisco Antonio Rocco Lahr
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFMG
• Texto Completo: http://dx.doi.org/10.5923/j.ijme.20180801.02; http://hdl.handle.net/1843/56904; https://orcid.org/0000-0001-6948-8268; https://orcid.org/0000-0002-6230-5569; https://orcid.org/0000-0001-7204-350X; https://orcid.org/0000-0003-3168-7055; https://orcid.org/0000-0002-4066-080X; https://orcid.org/0000-0002-3510-8498
• topic: Wood beams; Static bending; Strain; Stress; Madeira; Resistência à tração; Lecythidaceae

Wood is widely used in many sectors of civil construction as a structural material. Brazilian code ABNT NBR 7190:1997 "Design of Timber Structures" governs the method of project design as well as the characterization of wood for structural design. In this aspect the code considers wood as an orthoptic material, however is well known that the organic origin provides great anatomical complexity to its. This work aims to study the distribution of normal stresses in a Tauari wood beam subjected to the elastic regime, and to ascertain the current position of the Neutral Line during test. For this purpose, a four-point static bending test and subsequent compression and tension to the grain tests were performed to determine the modulus of elasticity and calculate the normal stresses by recording deformations and applying Hooke's Law. The data were statistically analyzed to define bests adjusts to Stress vs. Strain diagrams, and thus determine the location of the Neutral Line. It was verified that the position of the Neutral Line was a normal distribution variable, being located at 1,07cm above the geometric center of the board. Finally, the comparison between values of normal tension obtained experimentally and through the theoretical method was determined and similarities were verified in these data, being also plausible the theory for the calculation of the normal tensions of the wood beams, when it is in the elastic regime.