淹水程度对枫杨木材力学性质与气干密度、解剖特征间关系的影响

Effect of Flooding Degree on the Relation Between the Mechanic Properties and Air-dry Density, Anatomy Features of Pterocarya stenptera

对2组不同淹水程度下的枫杨木材力学性质与其气干密度、解剖特征间的关系进行了研究。结果表明,枫杨木材气干密度与抗弯强度、抗弯弹性模量、顺纹抗压强度和横纹(全部)抗压强度间的二项式回归效果比直线回归、指数回归及幂函数回归都好;第1组回归效果优于第2组,但总体上相关性不太高。木材抗弯强度等力学指标与木材解剖特征间具有较高的相关性,横纹(全部)抗压强度与双壁厚间的相关性在径、弦向上存在着较大的差异。

The relationships between the flooding degree and the main mechanical properties, airdry density, anatomy features were researched. The results indicate that the binomial regressions between the airdry density and the bending strength, modulus of bending, compression strength parallel to grain and compression strength perpendicular to grain are better than linear regression, exponential regression and power functional regression. At the same time, the regression result of No.1 group is better than that of No.2, the correlativity isn't very close generally. The correlations between the mechanic indexes such as bending strength etc., and the anatomy features are closer, while the correlations between the compression strength perpendicular to grain and double wall thickness are different. 