Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar
In this study effect of different NDT methods on dynamic properties in beech wood (flexural vibration and longitudinal vibration method) were evaluated .29 clear samples with nominal dimension of 2×4×36 cm selected and bending vibration in free-free beams and longitudinal vibration tests was perform...
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| Format: | Article |
| Language: | fas |
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Regional Information Center for Science and Technology (RICeST)
2014-12-01
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| Series: | تحقیقات علوم چوب و کاغذ ایران |
| Subjects: | |
| Online Access: | http://ijwpr.areeo.ac.ir/article_8468_509c10f7b6aa68de425a289fffcc4bf8.pdf |
| _version_ | 1818693701046632448 |
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| author | mostafa kohantorabi Fardad Golbabaei Hossein Hosseinkhani |
| author_facet | mostafa kohantorabi Fardad Golbabaei Hossein Hosseinkhani |
| author_sort | mostafa kohantorabi |
| collection | DOAJ |
| description | In this study effect of different NDT methods on dynamic properties in beech wood (flexural vibration and longitudinal vibration method) were evaluated .29 clear samples with nominal dimension of 2×4×36 cm selected and bending vibration in free-free beams and longitudinal vibration tests was performed on them. Results shows strong correlation between dynamic Young's modulus and acoustic coefficient measured with both Longitudinal vibration and flexural vibration method. Measuring damping factor values was significantly higher in flexural vibration compared to longitudinal vibration method, While the acoustic converting efficiency values from flexural vibration was smaller than values of this factor in longitudinal vibration method .There was good correlation between dynamic shear modulus of elasticity from flexural vibrations and dynamic modulus of elasticity in both methods, that it provides possibility of estimate the shear modulus of elasticity values according to dynamic Young's modulus of elasticity values from longitudinal vibration test.The results also indicated was a good correlation between the phase velocity in first to third modes from the bending vibration. In addition there was good correlation between sound velocity from longitudinal vibration and the phase velocity in first to third modes from the bending vibration. |
| first_indexed | 2024-12-17T13:17:52Z |
| format | Article |
| id | doaj.art-7380ef5774744198b42d8506a8055296 |
| institution | Directory Open Access Journal |
| issn | 1735-0913 2383-112X |
| language | fas |
| last_indexed | 2024-12-17T13:17:52Z |
| publishDate | 2014-12-01 |
| publisher | Regional Information Center for Science and Technology (RICeST) |
| record_format | Article |
| series | تحقیقات علوم چوب و کاغذ ایران |
| spelling | doaj.art-7380ef5774744198b42d8506a80552962022-12-21T21:46:57ZfasRegional Information Center for Science and Technology (RICeST)تحقیقات علوم چوب و کاغذ ایران1735-09132383-112X2014-12-0129463364310.22092/ijwpr.2014.84688468Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free barmostafa kohantorabi0Fardad Golbabaei1Hossein Hosseinkhani2, PhD Candidate, Department of wood science and technology, College of agriculture and natural resources, Science and research branch, Islamic Azad University, Tehran, Iran,Faculty member, Department of Wood Science and its products, Research Institute of Forests and Rangelands, Tehran, IranFaculty member, Department of Wood Science and its products, Research Institute of Forests and Rangelands, Tehran, IranIn this study effect of different NDT methods on dynamic properties in beech wood (flexural vibration and longitudinal vibration method) were evaluated .29 clear samples with nominal dimension of 2×4×36 cm selected and bending vibration in free-free beams and longitudinal vibration tests was performed on them. Results shows strong correlation between dynamic Young's modulus and acoustic coefficient measured with both Longitudinal vibration and flexural vibration method. Measuring damping factor values was significantly higher in flexural vibration compared to longitudinal vibration method, While the acoustic converting efficiency values from flexural vibration was smaller than values of this factor in longitudinal vibration method .There was good correlation between dynamic shear modulus of elasticity from flexural vibrations and dynamic modulus of elasticity in both methods, that it provides possibility of estimate the shear modulus of elasticity values according to dynamic Young's modulus of elasticity values from longitudinal vibration test.The results also indicated was a good correlation between the phase velocity in first to third modes from the bending vibration. In addition there was good correlation between sound velocity from longitudinal vibration and the phase velocity in first to third modes from the bending vibration.http://ijwpr.areeo.ac.ir/article_8468_509c10f7b6aa68de425a289fffcc4bf8.pdfFree vibration methodDynamic propertiesphase velocityShear modulusbeech |
| spellingShingle | mostafa kohantorabi Fardad Golbabaei Hossein Hosseinkhani Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar تحقیقات علوم چوب و کاغذ ایران Free vibration method Dynamic properties phase velocity Shear modulus beech |
| title | Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar |
| title_full | Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar |
| title_fullStr | Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar |
| title_full_unstemmed | Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar |
| title_short | Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar |
| title_sort | nondestructive evaluation of dynamic properties in beach wood using free vibration method on free free bar |
| topic | Free vibration method Dynamic properties phase velocity Shear modulus beech |
| url | http://ijwpr.areeo.ac.ir/article_8468_509c10f7b6aa68de425a289fffcc4bf8.pdf |
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