Temperature-Dependent Creep Behavior and Quasi-Static Mechanical Properties of Heat-Treated Wood

被引：10
作者：
Xing, Dong [1 ]
Wang, Xinzhou [2 ]
Wang, Siqun [3 ]
机构：
[1] Inner Mongolia Agr Univ, Coll Mat Sci & Art Design, Hohhot 010018, Peoples R China
[2] Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China
[3] Univ Tennessee, Ctr Renewable Carbon, Knoxville, TN 37996 USA
来源：
FORESTS | 2021年 / 12卷 / 08期
基金：
中国国家自然科学基金;
关键词：
heat-treated wood; nanoindentation; temperature-dependent; creep behavior; VISCOELASTIC BEHAVIOR; MOISTURE-CONTENT; CELL-WALL; NANOINDENTATION;
D O I：
10.3390/f12080968
中图分类号：
S7 [林业];
学科分类号：
0829 ; 0907 ;
摘要：
In this paper, Berkovich depth-sensing indentation has been used to study the effects of the temperature-dependent quasi-static mechanical properties and creep deformation of heat-treated wood at temperatures from 20 degrees C to 180 degrees C. The characteristics of the load-depth curve, creep strain rate, creep compliance, and creep stress exponent of heat-treated wood are evaluated. The results showed that high temperature heat treatment improved the hardness of wood cell walls and reduced the creep rate of wood cell walls. This is mainly due to the improvement of the crystallinity of the cellulose, and the recondensation and crosslinking reaction of the lignocellulose structure. The Burgers model is well fitted to study the creep behavior of heat-treated wood cell walls under different temperatures.
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页数：14
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