Analysis of cold temperature effect on stress wave velocity in green wood
Analysis of cold temperature effect on stress wave velocity in green wood
复制标题
低温对生材应力波速的影响分析
DOI:
10.1515/hf-2013-0151
复制
发表时间:
2014-08
期刊:
影响因子:
2.4
通讯作者:
王立海
中科院分区:
文献类型:
--
作者:
徐华东;王立海
The objective of this study was to investigate the effect of temperature on stress wave velocity (SWV) in green wood below zero degress centigrade (0°C). Both field and laboratory tests were conducted on standing Korean pine trees and small wood samples to study the effects of low temperature at various moisture content (MC) on SWV. As expected, SWV in wood increased with decreasing temperature. However, near 0°C, the SWV increment was not linear but showed disproportional high increments at MCs above 50%. To explain this phenomenon, differential scanning calorimeter (DSC) measurements were performed at various MCs and temperatures, i.e., the interrelation between the state of water aggregation and SWV was analyzed. The explanation of the irregular behavior of SWV as a function of temperature is straightforward: free water and a small portion of bound water in green wood are transformed from water to ice below zero degrees (0°C) centigrade. Thus the disproportional high SWV increment below 0°C reflects the aggregation change of water because the SWV in ice is higher than that in liquid water.
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影响因子:
0.9
作者:
R. Ross;K. A. Mcdonald;D. Green;K. C. Schad
通讯作者:
R. Ross;K. A. Mcdonald;D. Green;K. C. Schad
DOI:
10.1515/hf.2005.036
发表时间:
2005-02
期刊:
--
影响因子:
--
作者:
F. Divos;L. Dénes;Guillermo Íñiguez
通讯作者:
F. Divos;L. Dénes;Guillermo Íñiguez
影响因子:
1.4
作者:
Shan Gao;Xiping Wang;Lihai Wang;R. B. Allison
通讯作者:
Shan Gao;Xiping Wang;Lihai Wang;R. B. Allison
影响因子:
5.7
作者:
U. Weise;Thaddeus Maloney;H. Paulapuro
通讯作者:
U. Weise;Thaddeus Maloney;H. Paulapuro
DOI:
10.1007/s00107-005-0083-7
发表时间:
2006-03
期刊:
Holz als Roh- und Werkstoff
影响因子:
--
作者:
H. Bächle;John C. F. Walker
通讯作者:
H. Bächle;John C. F. Walker