Effect of Drying Temperature and Relative Humidity on Contraction Stress in Wood
As wood shrinks during the drying process, various stresses may develop and cause surface and internal checking. The aim of this study was to systematically investigate the effect of the drying temperature, relative humidity, and specimen thickness on the contraction stress in elm wood (Ulmus pumila...
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North Carolina State University
2016-06-01
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doaj-984d516bad934230a31d818194c7c1f22020-11-24T23:31:42ZengNorth Carolina State UniversityBioResources1930-21261930-21262016-06-011136625663810.15376/biores.11.3.6625-6638Effect of Drying Temperature and Relative Humidity on Contraction Stress in WoodJianxia Liu0Ximing Wang1Inner Mongolia Agriculture University; ChinaInner Mongolia Agriculture University; ChinaAs wood shrinks during the drying process, various stresses may develop and cause surface and internal checking. The aim of this study was to systematically investigate the effect of the drying temperature, relative humidity, and specimen thickness on the contraction stress in elm wood (Ulmus pumila L.) specimens during drying. The contraction stress was used as an indirect indicator of drying stresses. A measurement system was developed in-house and used to simultaneously and continuously obtain the required measurements during drying, which were then used to determine the moisture content, amount of shrinkage, and contraction stress of the wood specimens. In the process of drying, the contraction stress was initially negative with a decrease in the moisture content and an increase in the shrinkage. Then the contraction stress increased gradually and eventually stabilized upon reaching the maximum. The results also showed that as the temperature increased, the moisture content decreased, the shrinkage decreased, the maximum contraction stress decreased, and the contraction stress reached a maximum in a shorter amount of time.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_3_6625_Liu_Drying_Temperature_Relative_Humidity_Contraction_WoodContraction stressShrinkageMoisture contentChecking |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jianxia Liu Ximing Wang |
spellingShingle |
Jianxia Liu Ximing Wang Effect of Drying Temperature and Relative Humidity on Contraction Stress in Wood BioResources Contraction stress Shrinkage Moisture content Checking |
author_facet |
Jianxia Liu Ximing Wang |
author_sort |
Jianxia Liu |
title |
Effect of Drying Temperature and Relative Humidity on Contraction Stress in Wood |
title_short |
Effect of Drying Temperature and Relative Humidity on Contraction Stress in Wood |
title_full |
Effect of Drying Temperature and Relative Humidity on Contraction Stress in Wood |
title_fullStr |
Effect of Drying Temperature and Relative Humidity on Contraction Stress in Wood |
title_full_unstemmed |
Effect of Drying Temperature and Relative Humidity on Contraction Stress in Wood |
title_sort |
effect of drying temperature and relative humidity on contraction stress in wood |
publisher |
North Carolina State University |
series |
BioResources |
issn |
1930-2126 1930-2126 |
publishDate |
2016-06-01 |
description |
As wood shrinks during the drying process, various stresses may develop and cause surface and internal checking. The aim of this study was to systematically investigate the effect of the drying temperature, relative humidity, and specimen thickness on the contraction stress in elm wood (Ulmus pumila L.) specimens during drying. The contraction stress was used as an indirect indicator of drying stresses. A measurement system was developed in-house and used to simultaneously and continuously obtain the required measurements during drying, which were then used to determine the moisture content, amount of shrinkage, and contraction stress of the wood specimens. In the process of drying, the contraction stress was initially negative with a decrease in the moisture content and an increase in the shrinkage. Then the contraction stress increased gradually and eventually stabilized upon reaching the maximum. The results also showed that as the temperature increased, the moisture content decreased, the shrinkage decreased, the maximum contraction stress decreased, and the contraction stress reached a maximum in a shorter amount of time. |
topic |
Contraction stress Shrinkage Moisture content Checking |
url |
http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_11_3_6625_Liu_Drying_Temperature_Relative_Humidity_Contraction_Wood |
work_keys_str_mv |
AT jianxialiu effectofdryingtemperatureandrelativehumidityoncontractionstressinwood AT ximingwang effectofdryingtemperatureandrelativehumidityoncontractionstressinwood |
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1725536356507058176 |