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我们通过测量从活树上钻取下来的5mm直径的木芯的声速,确定了它的三个劲度模量和三个剪切模量,并把所得的结果和标准试样的静弯曲加载试验结果和方块试件的超声波穿透试验的结果进行了比较.木芯的弹性模量和标准试样的弹性模量之间有良好的关系.联系木芯断裂模量和纵向劲度模量的回归方程及联系标准试样断裂模量和木芯的纵向波速的回归方程使我们能用简单的超声测试来预计活树木材的强度.这个方法可以迅速地检查出各棵活树力学特性之间的差异.
We determined its three stiffness moduli and three shear moduli by measuring the speed of sound of a 5 mm diameter wood core drilled from a living tree and loading the results and static bending of a standard specimen The results of the tests are compared with the results of the ultrasonic penetration test of the square specimens.The elastic modulus of the wood core and the elastic modulus of the standard specimen have a good relationship.The relationship between the modulus of rupture of wood core and the modulus of longitudinal stiffness Regression equations and associated criteria The regression equation for the modulus of rupture of the specimen and the longitudinal wave velocity of the wood core allows us to predict the strength of the living tree using a simple ultrasonic test that can quickly detect the mechanical properties of the living trees The difference between.