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以兴安落叶松成熟材为研究对象,通过试验法获得早晚材薄片的密度及顺纹抗拉强度,根据早晚材物理力学性质,建立并验证兴安落叶松成熟材无疵试样顺纹抗拉最大破坏载荷以及抗拉强度的力学模型。结果表明,密度可作为影响成熟材无疵试样抗拉强度变异性的主要影响因素;利用早晚材为基础单元,可建立无疵试样顺纹抗拉破坏载荷以及抗拉强度的力学表达式,其相对误差低于15%。该方法可为进一步建立兴安落叶松其他力学性质模型打下基础。
Taking the larch of Larch as the research object, the density and the parallel tensile strength of Larch sheets were obtained by the test method. According to the physical and mechanical properties of the Longevity Lyle material, Mechanical model of failure load and tensile strength. The results show that the density can be used as the main influencing factor of the tensile strength variability of the uncut specimen of mature wood. By using the early and late material as the basic unit, the mechanical expression of the unbeaten specimen along the moat tensile load and the tensile strength can be established , The relative error is less than 15%. This method can lay a foundation for further establishment of other mechanical properties of Larix gmelinii.