Application of nondestructive ultrasound techniques, transverse vibration and stress-wave for timber evaluation
The application of nondestructive techniques can assist in timber evaluation, without the need to extract specimens. Two of the main mechanic evaluation techniques are the nondestructive techniques of ultrasound and transversal vibration . The evolution in the use of nondestructive techniques has le...
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ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
2009
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ojs-article-94202010-02-03T16:17:26Z Application of nondestructive ultrasound techniques, transverse vibration and stress-wave for timber evaluation Aplicação das técnicas não-destrutivas de ultra-som, vibração transversal e ondas de tensão para avaliação de madeira Candian, Marcela Sales, Almir Ensaio não-destrutivo. Ultra-som. Vibração transversal. Ondas de tensão. The application of nondestructive techniques can assist in timber evaluation, without the need to extract specimens. Two of the main mechanic evaluation techniques are the nondestructive techniques of ultrasound and transversal vibration . The evolution in the use of nondestructive techniques has led to the development of new technologies, particularly the stress-wave technique, which allows the obtention of tomographic images of timber. The purpose of this study was to verify the accuracy of the ultrasonic and transverse vibration techniques in comparison with the values obtained from static tests and tomographic images obtained through the use of stress waves for Eucalyptus citriodora. The values of the coefficient of determination for the ultrasonic technique (R2 = 0.76) and for the transverse vibration technique (R2= 0.80) were significant, demonstrating that the ultrasonic and transverse vibration techniques are important tools for the nondestructive inference of the modulus of elasticity of timber. The results also show that the tomographic images obtained through the use of the stress-wave technique allow the percentage of deteriorated area of timber to be estimated with adequate reliability. Aplicação de técnicas não-destrutivas pode auxiliar no processo de avaliação da madeira, não sendo necessária a extração de corpos-de-prova. Entre as técnicas de avaliação mecânica, destacam-se as técnicas não-destrutivas de ultra-som e de vibração transversal. Com o avanço no uso das técnicas não-destrutivas, tornou-se possível o desenvolvimento de novas tecnologias, entre as quais se destaca a técnica de ondas de tensão, que permite a obtenção de imagem tomográfica da madeira. O objetivo deste trabalho foi verificar a acuracidade das técnicas de vibração transversal e ultra-som comparativamente aos valores obtidos em ensaios estáticos e a obtenção de imagem tomográfica a partir do emprego de ondas de tensão para a espécie Eucalyptus citriodora. Os valores obtidos de coeficiente de determinação para as técnicas de ultra-som (R² = 0,76) e vibração transversal (R² = 0,80) são significativos, demonstrando que essas são importantes ferramentas para a inferência do módulo de elasticidade da madeira. Os resultados permitem também verificar que a imagem tomográfica obtida com o emprego de ondas de tensão possibilita estimar a porcentagem da área deteriorada com adequada confiabilidade. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído CAPES, FAPESP, MCT/CNPq 2009-11-25 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.ufrgs.br/ambienteconstruido/article/view/9420 Ambiente Construído; v. 9, n. 4 (2009); 83-97 Ambiente Construído; v. 9, n. 4 (2009); 83-97 Ambiente Construído; v. 9, n. 4 (2009); 83-97 1678-8621 1415-8876 por https://seer.ufrgs.br/ambienteconstruido/article/view/9420/7046 Direitos autorais 2016 Ambiente Construído https://creativecommons.org/licenses/by/4.0 |
| institution |
Universidade Federal do Rio Grande do Sul |
| collection |
OJS |
| language |
por |
| format |
Online |
| author |
Candian, Marcela Sales, Almir |
| spellingShingle |
Candian, Marcela Sales, Almir Application of nondestructive ultrasound techniques, transverse vibration and stress-wave for timber evaluation |
| author_facet |
Candian, Marcela Sales, Almir |
| author_sort |
Candian, Marcela |
| title |
Application of nondestructive ultrasound techniques, transverse vibration and stress-wave for timber evaluation |
| title_short |
Application of nondestructive ultrasound techniques, transverse vibration and stress-wave for timber evaluation |
| title_full |
Application of nondestructive ultrasound techniques, transverse vibration and stress-wave for timber evaluation |
| title_fullStr |
Application of nondestructive ultrasound techniques, transverse vibration and stress-wave for timber evaluation |
| title_full_unstemmed |
Application of nondestructive ultrasound techniques, transverse vibration and stress-wave for timber evaluation |
| title_sort |
application of nondestructive ultrasound techniques, transverse vibration and stress-wave for timber evaluation |
| description |
The application of nondestructive techniques can assist in timber evaluation, without the need to extract specimens. Two of the main mechanic evaluation techniques are the nondestructive techniques of ultrasound and transversal vibration . The evolution in the use of nondestructive techniques has led to the development of new technologies, particularly the stress-wave technique, which allows the obtention of tomographic images of timber. The purpose of this study was to verify the accuracy of the ultrasonic and transverse vibration techniques in comparison with the values obtained from static tests and tomographic images obtained through the use of stress waves for Eucalyptus citriodora. The values of the coefficient of determination for the ultrasonic technique (R2 = 0.76) and for the transverse vibration technique (R2= 0.80) were significant, demonstrating that the ultrasonic and transverse vibration techniques are important tools for the nondestructive inference of the modulus of elasticity of timber. The results also show that the tomographic images obtained through the use of the stress-wave technique allow the percentage of deteriorated area of timber to be estimated with adequate reliability. |
| publisher |
ANTAC - Associação Nacional de Tecnologia do Ambiente Construído |
| publishDate |
2009 |
| url |
https://seer.ufrgs.br/ambienteconstruido/article/view/9420 |
| work_keys_str_mv |
AT candianmarcela applicationofnondestructiveultrasoundtechniquestransversevibrationandstresswavefortimberevaluation AT salesalmir applicationofnondestructiveultrasoundtechniquestransversevibrationandstresswavefortimberevaluation AT candianmarcela aplicacaodastecnicasnaodestrutivasdeultrasomvibracaotransversaleondasdetensaoparaavaliacaodemadeira AT salesalmir aplicacaodastecnicasnaodestrutivasdeultrasomvibracaotransversaleondasdetensaoparaavaliacaodemadeira |
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1709370571852087296 |