【摘要】 本文对9年生、15年生、22年生的毛红椿木材物理力学性能进行测定,结果表明:树龄对毛红椿木材物理力学性能影响显著,毛红椿幼龄材木材密度、力学强度均较低,随着树龄增加,密度、力学性能指标均有较大幅度提高,体积干缩系数逐渐减小。毛红椿木材差异干缩均较大,弦向干缩比径向干缩差异显著,但体积湿胀率变化不大。更多还原

【Abstract】 The physical and mechanical properties of 9-year-old,15-year-old and 22-year-old of Toonaciliata wood were measured in the present study. The results showed that the trees ages had significant effect on the timber physical and mechanical properties of Toonaciliata. Juvenile wood characterized in lower density and mechanical strength. These two indicators remarkably increased with the increment of age,while volume shrinkage coefficients decreased gradually with age. The wood shrinkage ratio demonstrated higher differences in Toonaciliata,and tangential shrinkage was more significant than radial shrinkage,but swelling ratio showed little changed.更多还原