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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Autores principales:	mostafa kohantorabi, Fardad Golbabaei, Hossein Hosseinkhani
Formato:	article
Lenguaje:	FA
Publicado:	Regional Information Center for Science and Technology (RICeST) 2014
Materias:	Free vibration method Dynamic properties phase velocity Shear modulus beech Forestry SD1-669.5
Acceso en línea:	https://doaj.org/article/7380ef5774744198b42d8506a8055296
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spelling	oai:doaj.org-article:7380ef5774744198b42d8506a80552962021-12-02T00:20:29ZNondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar1735-09132383-112X10.22092/ijwpr.2014.8468https://doaj.org/article/7380ef5774744198b42d8506a80552962014-12-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_8468_509c10f7b6aa68de425a289fffcc4bf8.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XIn 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.mostafa kohantorabiFardad GolbabaeiHossein HosseinkhaniRegional Information Center for Science and Technology (RICeST)articleFree vibration methodDynamic propertiesphase velocityShear modulusbeechForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 29, Iss 4, Pp 633-643 (2014)
institution	DOAJ
collection	DOAJ
language	FA
topic	Free vibration method Dynamic properties phase velocity Shear modulus beech Forestry SD1-669.5
spellingShingle	Free vibration method Dynamic properties phase velocity Shear modulus beech Forestry SD1-669.5 mostafa kohantorabi Fardad Golbabaei Hossein Hosseinkhani Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar
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.
format	article
author	mostafa kohantorabi Fardad Golbabaei Hossein Hosseinkhani
author_facet	mostafa kohantorabi Fardad Golbabaei Hossein Hosseinkhani
author_sort	mostafa kohantorabi
title	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_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_sort	nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar
publisher	Regional Information Center for Science and Technology (RICeST)
publishDate	2014
url	https://doaj.org/article/7380ef5774744198b42d8506a8055296
work_keys_str_mv	AT mostafakohantorabi nondestructiveevaluationofdynamicpropertiesinbeachwoodusingfreevibrationmethodonfreefreebar AT fardadgolbabaei nondestructiveevaluationofdynamicpropertiesinbeachwoodusingfreevibrationmethodonfreefreebar AT hosseinhosseinkhani nondestructiveevaluationofdynamicpropertiesinbeachwoodusingfreevibrationmethodonfreefreebar
_version_	1718403809103839232

Nondestructive evaluation of dynamic properties in beach wood using free vibration method on free- free bar

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