This paper studied 24-year-old Larix olgensis progeny forest to analyze the physical and me-chanical properties of wood .The results showed that air-dry density and basic density of wood were 0.57 g/cm3 and 0.54 g/cm3 , belonging to the medium level .With high shrinkage rate , air-dry difference shrinkage and oven-dry difference shrinkage were 2.01 and 1.97 respectively .Cleavage resistance of rad-ical surface and tangential surface were 13.42 and 10.18 N/mm, and bending resistance was 89.12 MPa.The shear strength with parallel grain of tangential surface and radical surface were 11.85 MPa and 12.35 MPa respectively and the compressive strength was 54.27 MP.The hardness of end sur-face, tangential surface and radical surface were 3973N, 1703N and 1783N.The comprehensive strength of Larix olgensis progeny forest was 143.39 MPa, belonging to the medium level .%以24年生长白落叶松子代测定林为研究材料,对其木材物理力学性质进行测定与分析.结果表明:木材气干密度和基本密度分别为0.57 g/cm3和0.54 g/cm3,属中等级别.气干差异干缩和全干差异干缩分别为2.01和1.97,木材干缩率较大.径面和弦面抗劈力分别为13.42和10.18 N/mm,抗弯强度为89.12 MPa,弦面和径面顺纹抗剪强度分别为11.85 MPa和12.35 MPa,抗压强度为54.27 MPa,端面、弦面和径面的硬度分别为3973N、1703N和1783N.长白落叶松子代木材的综合强度为143.39 MPa,属中等级材.
展开▼
