Influence of the applied pressure of the transducer on the propagation speed of the ultrasonic wave in wood
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Edgar V.M. Carrasco
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Rejane C. Alves
Abstract
The non-destructive wave propagation technique is used to estimate the wood’s modulus of elasticity. The propagation speed of ultrasonic waves is influenced by some factors, among them: the type of transducer used in the test, the form of coupling and the sensitivity of the transducers. The objective of the study was to evaluate the influence of the contact pressure of the transducers on the ultrasonic speed. Ninety-eight tests were carried out on specimens of the species Eucalyptus grandis, with dimensions of 120 × 120 × 50 mm. The calibration of the pressure exerted by the transducer was controlled by a pressure gauge using a previously calibrated load cell. The robust statistical analysis allowed to validate the experimental results and to obtain consistent conclusions. The results showed that the wave propagation speed is not influenced by the pressure exerted by the transducer.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: The authors are grateful for the financial support of Conselho Nacional de Desenvolvimento Científico e Tecnológico, (CNPq/Brazil), Finance Code 002 and Fundação de Amparo à Pesquisa de Minas Gerais, (FAPEMIG/Brazil).
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Articles in the same Issue
- Frontmatter
- Original Articles
- Near-infrared spectroscopy and hyperspectral imaging can aid in the prediction and mapping of polyploid acacia hybrid wood properties in tree improvement programs
- Monitoring imbibition dynamics at tissue level in Norway spruce using X-ray imaging
- Influence of the applied pressure of the transducer on the propagation speed of the ultrasonic wave in wood
- Prediction of shear strength parallel to grain in clear wood of oak (Quercus robur L.) on the basis of shear plane orientation, density and anatomical traits
- Sound absorption characteristics of three species (binuang, balsa and paulownia) of low density hardwood
- Thermal conductivity of untreated and chemically treated poplar bark and wood
- Sorption behavior and swelling of citric acid and sorbitol (SorCA) treated wood
- Reaction mechanisms of furfuryl alcohol polymer with wood cell wall components
Articles in the same Issue
- Frontmatter
- Original Articles
- Near-infrared spectroscopy and hyperspectral imaging can aid in the prediction and mapping of polyploid acacia hybrid wood properties in tree improvement programs
- Monitoring imbibition dynamics at tissue level in Norway spruce using X-ray imaging
- Influence of the applied pressure of the transducer on the propagation speed of the ultrasonic wave in wood
- Prediction of shear strength parallel to grain in clear wood of oak (Quercus robur L.) on the basis of shear plane orientation, density and anatomical traits
- Sound absorption characteristics of three species (binuang, balsa and paulownia) of low density hardwood
- Thermal conductivity of untreated and chemically treated poplar bark and wood
- Sorption behavior and swelling of citric acid and sorbitol (SorCA) treated wood
- Reaction mechanisms of furfuryl alcohol polymer with wood cell wall components
