Nondestructive Evaluation of Effects of Moisture Content and Temperature on the Elastic Properties of Beech Wood Using Flexural Vibration Test
In this study, 10 samples of beech wood, without apparent defect, with dimensions of 360 × 16 × 16 cm (length × radial × tangential) were selected, and after being exposed to variable temperature (60, 80, 100, 120, 140, 160, and 180°C) and moisture content conditions (moisture content in con...
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Regional Information Center for Science and Technology (RICeST)
2017
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oai:doaj.org-article:09b8c880fb6f41bf8c174ac71c1987002021-12-02T07:00:16ZNondestructive Evaluation of Effects of Moisture Content and Temperature on the Elastic Properties of Beech Wood Using Flexural Vibration Test1735-09132383-112X10.22092/ijwpr.2017.107022https://doaj.org/article/09b8c880fb6f41bf8c174ac71c1987002017-04-01T00:00:00Zhttp://ijwpr.areeo.ac.ir/article_107022_f3953eed112801185dc15145d235ca0d.pdfhttps://doaj.org/toc/1735-0913https://doaj.org/toc/2383-112XIn this study, 10 samples of beech wood, without apparent defect, with dimensions of 360 × 16 × 16 cm (length × radial × tangential) were selected, and after being exposed to variable temperature (60, 80, 100, 120, 140, 160, and 180°C) and moisture content conditions (moisture content in conditions of: saturated with water (EMC=35±5%), equilibrium moisture content exposed to air (EMC=19±5%), and conditioning moisture content in a climatic chamber (EMC=12±2%), they underwent free flexural vibration test in two longitudinal-tangential and longitudinal-radial planes, and some of the physical, mechanical, and acoustical properties in both planes were investigated. The results showed that the correlation coefficient of the first three modes of flexural vibration in both planes under climatic chamber had a similar situation, but when the samples were in the water-saturated condition, they showed an adverse behavior in each plane. The effect of increasing the temperature above 100°C caused stresses resulting from shrinkage leading to the development of micro-cracks and reduction in the modulus of elasticity of cell walls and ultimately reduction in wave propagation ability of wood, thus increase in the damping vibration values in both longitudinal-tangential and longitudinal-radial planes of the samples. Also, the concurrent changes in modulus of elasticity and damping vibration in both vibration planes are a desirable indicator for monitoring the process from the primary logging process stages to processes such as wood drying and heat treatment.mostafa kohantorabiMehran RoohniaShadabeh FathiRegional Information Center for Science and Technology (RICeST)articleMoistureTemperatureVibrationOnline controlTimoshenko beam theoryAcousticForestrySD1-669.5FAتحقیقات علوم چوب و کاغذ ایران, Vol 32, Iss 1, Pp 13-24 (2017) |
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DOAJ |
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FA |
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Moisture Temperature Vibration Online control Timoshenko beam theory Acoustic Forestry SD1-669.5 |
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Moisture Temperature Vibration Online control Timoshenko beam theory Acoustic Forestry SD1-669.5 mostafa kohantorabi Mehran Roohnia Shadabeh Fathi Nondestructive Evaluation of Effects of Moisture Content and Temperature on the Elastic Properties of Beech Wood Using Flexural Vibration Test |
| description |
In this study, 10 samples of beech wood, without apparent defect, with dimensions of 360 × 16 × 16 cm (length × radial × tangential) were selected, and after being exposed to variable temperature (60, 80, 100, 120, 140, 160, and 180°C) and moisture content conditions (moisture content in conditions of: saturated with water (EMC=35±5%), equilibrium moisture content exposed to air (EMC=19±5%), and conditioning moisture content in a climatic chamber (EMC=12±2%), they underwent free flexural vibration test in two longitudinal-tangential and longitudinal-radial planes, and some of the physical, mechanical, and acoustical properties in both planes were investigated. The results showed that the correlation coefficient of the first three modes of flexural vibration in both planes under climatic chamber had a similar situation, but when the samples were in the water-saturated condition, they showed an adverse behavior in each plane. The effect of increasing the temperature above 100°C caused stresses resulting from shrinkage leading to the development of micro-cracks and reduction in the modulus of elasticity of cell walls and ultimately reduction in wave propagation ability of wood, thus increase in the damping vibration values in both longitudinal-tangential and longitudinal-radial planes of the samples. Also, the concurrent changes in modulus of elasticity and damping vibration in both vibration planes are a desirable indicator for monitoring the process from the primary logging process stages to processes such as wood drying and heat treatment. |
| format |
article |
| author |
mostafa kohantorabi Mehran Roohnia Shadabeh Fathi |
| author_facet |
mostafa kohantorabi Mehran Roohnia Shadabeh Fathi |
| author_sort |
mostafa kohantorabi |
| title |
Nondestructive Evaluation of Effects of Moisture Content and Temperature on the Elastic Properties of Beech Wood Using Flexural Vibration Test |
| title_short |
Nondestructive Evaluation of Effects of Moisture Content and Temperature on the Elastic Properties of Beech Wood Using Flexural Vibration Test |
| title_full |
Nondestructive Evaluation of Effects of Moisture Content and Temperature on the Elastic Properties of Beech Wood Using Flexural Vibration Test |
| title_fullStr |
Nondestructive Evaluation of Effects of Moisture Content and Temperature on the Elastic Properties of Beech Wood Using Flexural Vibration Test |
| title_full_unstemmed |
Nondestructive Evaluation of Effects of Moisture Content and Temperature on the Elastic Properties of Beech Wood Using Flexural Vibration Test |
| title_sort |
nondestructive evaluation of effects of moisture content and temperature on the elastic properties of beech wood using flexural vibration test |
| publisher |
Regional Information Center for Science and Technology (RICeST) |
| publishDate |
2017 |
| url |
https://doaj.org/article/09b8c880fb6f41bf8c174ac71c198700 |
| work_keys_str_mv |
AT mostafakohantorabi nondestructiveevaluationofeffectsofmoisturecontentandtemperatureontheelasticpropertiesofbeechwoodusingflexuralvibrationtest AT mehranroohnia nondestructiveevaluationofeffectsofmoisturecontentandtemperatureontheelasticpropertiesofbeechwoodusingflexuralvibrationtest AT shadabehfathi nondestructiveevaluationofeffectsofmoisturecontentandtemperatureontheelasticpropertiesofbeechwoodusingflexuralvibrationtest |
| _version_ |
1718399615425839104 |