Wave speed and modulus of elasticity by ultrasound and stress waves of Pinus spp. Mexican wood beams

Authors

  • Javier Sotomayor Universidad Michoacana de San Nicolás de Hidalgo (Mexico)
  • Mariana Ramírez Universidad Michoacana de San Nicolás de Hidalgo (Mexico)

DOI:

https://doi.org/10.4067/S0718-50732015000100006

Keywords:

mechanical characterization, density, moisture content, wood structures, structural assesment

Abstract

The wood construction industry requires data of the mechanical strength of wood with dimensions and classification suitable to be used as structural elements. This research proposes an experimental strategy for the mechanical characterization of wood beams and their application as an engineering material. The objective of the research was to determine the wave speeds and moduli of elasticity of Pinus spp. beams using ultrasound and stress waves, studying 70 Pinus spp. beams with dimensions of 0.10 m x 0.15 m in the transverse direction, 35 beams of 5 m and 35 of 6 m length. The speeds of transmission showed coefficients of variation consistent with the structural heterogeneity of wood. The values of these coefficients increased when the second-level characteristics were calculated, as in the case of the moduli of elasticity. The speed and the modulus of elasticity showed an important anisotropy character for the calculus of the mechanical strength of the beams. Likewise, the parameters calculated with the stress wave method were higher than those determined by ultrasound. The results allow concluding that theultrasound and stress wave techniques can determine the speed wave and the modulus of elasticity of Pinus spp. wood beams.

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Author Biography

Javier Sotomayor, Universidad Michoacana de San Nicolás de Hidalgo (Mexico)

Facultad de Ingeniería en Tecnología de la Madera Morelia, México Profesor

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Published

2015-04-13

How to Cite

Sotomayor, J., & Ramírez, M. (2015). Wave speed and modulus of elasticity by ultrasound and stress waves of Pinus spp. Mexican wood beams. Revista Ingeniería De Construcción, 30(1), 69–79. https://doi.org/10.4067/S0718-50732015000100006

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Section

Original Research