Investigation the acoustic behavior of poplar and spruce species reaction wood using ultrasonic technique
The acoustic behavior of reaction and normal woods, phase velocity, group velocity and attenuation coefficients in the main directions for two wood species (Populus deltoids & Picea abies), were measured and compared. The results did not show any significant difference between phase velocities o...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | fas |
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Regional Information Center for Science and Technology (RICeST)
2012-06-01
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| Series: | تحقیقات علوم چوب و کاغذ ایران |
| Subjects: | |
| Online Access: | http://ijwpr.areeo.ac.ir/article_117069_c0e4a08a7913ced2a9f5f3fa610d1168.pdf |
| _version_ | 1818422980014768128 |
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| author | Mohammad ali Sadat nia Ali akbar Enayati Loeic Brancheriau Kambiz Pourtahmasi Farhang Honarparvar |
| author_facet | Mohammad ali Sadat nia Ali akbar Enayati Loeic Brancheriau Kambiz Pourtahmasi Farhang Honarparvar |
| author_sort | Mohammad ali Sadat nia |
| collection | DOAJ |
| description | The acoustic behavior of reaction and normal woods, phase velocity, group velocity and attenuation coefficients in the main directions for two wood species (Populus deltoids & Picea abies), were measured and compared. The results did not show any significant difference between phase velocities of normal and tension wood at the same ring in poplar wood. But in compression wood from spruce, phase velocity in longitudinal direction was lower; while in transverse direction was higher compared to normal wood. Group velocity as an index of speed of wave energy in compression wood also was less than that in normal wood. In radial and tangential directions, there was no significant difference between group velocity of compression and normal woods of spruce. In poplar species, in all main directions, the measured group velocities, both for tension and normal woods were identical. The result also showed that the attenuation coefficients in reaction wood of two wood species (poplar and spruce) were less than those of normal wood in all directions. In compression and tension woods, a high correlation was observed between acoustic radiation and wood density. |
| first_indexed | 2024-12-14T13:34:52Z |
| format | Article |
| id | doaj.art-af862dc594264672904ce78dcb600fbb |
| institution | Directory Open Access Journal |
| issn | 1735-0913 2383-112X |
| language | fas |
| last_indexed | 2024-12-14T13:34:52Z |
| publishDate | 2012-06-01 |
| publisher | Regional Information Center for Science and Technology (RICeST) |
| record_format | Article |
| series | تحقیقات علوم چوب و کاغذ ایران |
| spelling | doaj.art-af862dc594264672904ce78dcb600fbb2022-12-21T22:59:36ZfasRegional Information Center for Science and Technology (RICeST)تحقیقات علوم چوب و کاغذ ایران1735-09132383-112X2012-06-0127230631810.22092/ijwpr.2012.117069117069Investigation the acoustic behavior of poplar and spruce species reaction wood using ultrasonic techniqueMohammad ali Sadat nia0Ali akbar Enayati1Loeic Brancheriau2Kambiz Pourtahmasi3Farhang Honarparvar4Assistant Professor, Wood and Paper Sciences, Khatamoanbia University of BehbahanProfessor, Wood and Paper Sciences, Tehran UniversityAssistant Professor, Mechanics Sciences, Montpellier UniversityDepartment of Wood and Paper Science and Technology, Faculty of Natural Resources, University of TehranAssistant Professor, Wood and Paper Sciences, Tehran UniversityThe acoustic behavior of reaction and normal woods, phase velocity, group velocity and attenuation coefficients in the main directions for two wood species (Populus deltoids & Picea abies), were measured and compared. The results did not show any significant difference between phase velocities of normal and tension wood at the same ring in poplar wood. But in compression wood from spruce, phase velocity in longitudinal direction was lower; while in transverse direction was higher compared to normal wood. Group velocity as an index of speed of wave energy in compression wood also was less than that in normal wood. In radial and tangential directions, there was no significant difference between group velocity of compression and normal woods of spruce. In poplar species, in all main directions, the measured group velocities, both for tension and normal woods were identical. The result also showed that the attenuation coefficients in reaction wood of two wood species (poplar and spruce) were less than those of normal wood in all directions. In compression and tension woods, a high correlation was observed between acoustic radiation and wood density.http://ijwpr.areeo.ac.ir/article_117069_c0e4a08a7913ced2a9f5f3fa610d1168.pdftension woodcompression woodacoustic behaviorphase velocityattenuation coefficient |
| spellingShingle | Mohammad ali Sadat nia Ali akbar Enayati Loeic Brancheriau Kambiz Pourtahmasi Farhang Honarparvar Investigation the acoustic behavior of poplar and spruce species reaction wood using ultrasonic technique تحقیقات علوم چوب و کاغذ ایران tension wood compression wood acoustic behavior phase velocity attenuation coefficient |
| title | Investigation the acoustic behavior of poplar and spruce species reaction
wood using ultrasonic technique |
| title_full | Investigation the acoustic behavior of poplar and spruce species reaction
wood using ultrasonic technique |
| title_fullStr | Investigation the acoustic behavior of poplar and spruce species reaction
wood using ultrasonic technique |
| title_full_unstemmed | Investigation the acoustic behavior of poplar and spruce species reaction
wood using ultrasonic technique |
| title_short | Investigation the acoustic behavior of poplar and spruce species reaction
wood using ultrasonic technique |
| title_sort | investigation the acoustic behavior of poplar and spruce species reaction wood using ultrasonic technique |
| topic | tension wood compression wood acoustic behavior phase velocity attenuation coefficient |
| url | http://ijwpr.areeo.ac.ir/article_117069_c0e4a08a7913ced2a9f5f3fa610d1168.pdf |
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