Influence of moisture content on the dynamic modulus of elasticity

Authors

DOI:

https://doi.org/10.33448/rsd-v11i11.33687

Keywords:

Bending test; Non-destructive test; Pinus spp. wood; Frequency; Fiber saturation.

Abstract

Pinus forests are the second most planted in Brazil and the wood obtained from them is mainly used as structural elements in the civil construction sector. The Brazilian standard that deals with calculations of wooden structures projects recommends the use of wood in the range of 10% to 20% of moisture content. Thus, this study aimed to present an investigation about the influence of moisture content on the static modulus of elasticity (MOEst) of wooden beams by transverse vibration tests. The MOEst was evaluated by static bending tests and transverse vibration tests for various moisture content. The transverse vibration test was performed in a free condition using an accelerometer and an impulse hammer, and the dynamic modulus of elasticity (MOEd) was determined from the frequency of the first bending vibration mode. A total of 20 wooden beams were obtained from freshly cut Pinus spp. logs with initial high moisture content were used, with nominal dimensions of 5 cm × 10 cm × 200 cm (thickness × width × length). It was observed that the MOEd is also affected by moisture content according to the non-linear regression model. There were significant changes in the dynamic modulus of elasticity (MOEd) for the moisture contents (M) below 25% (near the fiber saturation point - FSP).

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Published

21/08/2022

How to Cite

CARREIRA, M. R. .; SEGUNDINHO, P. G. de A. .; GONÇALVES, F. G.; PAES, J. B. .; DIAS, A. A. .; MEDEIROS NETO, P. N. de .; MASTELA, L. da C. .; LOPEZ, Y. M. . Influence of moisture content on the dynamic modulus of elasticity. Research, Society and Development, [S. l.], v. 11, n. 11, p. e232111133687, 2022. DOI: 10.33448/rsd-v11i11.33687. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/33687. Acesso em: 12 nov. 2024.

Issue

Vol. 11 No. 11

Section

Engineerings

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Copyright (c) 2022 Marcelo Rodrigo Carreira; Pedro Gutemberg de Alcântara Segundinho; Fabricio Gomes Gonçalves; Juarez Benigno Paes; Antônio Alves Dias; Pedro Nicó de Medeiros Neto; Leonor da Cunha Mastela; Yonny Martinez Lopez

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