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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/cm~3和0.54 g/cm~3,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10.18N/mm,抗弯强度为89.12MPa,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143.39MPa,属中等级材。
Twenty-four years of growth of Larix gmelinii was used as test material, and its physical and mechanical properties were measured and analyzed. The results showed that the average dry density and basic density of wood were 0.57 g / cm ~ 3 and 0.54 g / cm ~ 3, respectively. Air-dry difference between dry shrinkage and dry-dry shrinkage difference of 2.01 and 1.97, respectively, larger wood shrinkage rate. The diametrical and chordal cleavage forces were 13.42 and 10.18 N / mm, respectively. The flexural strength was 89.12 MPa. The shear strength along the chordal surface and the radial surface were 11.85 MPa and 12.35 MPa, respectively. The compressive strength was 54.27 MPa, The chord and radial hardness were 3973N, 1703N and 1783N, respectively. The overall strength of Larix olgensis wood is 143.39MPa, which belongs to medium grade wood.