辊压处理大青杨木材力学性能变异研究

Research on Variance of the Mechanics Strength of Populus ussuriensis Lumber Compressed by Roller

对辊压处理的大青杨板材和对应的素材进行8种力学性能测试。结果表明,辊压处理材的力学强度指标均有所下降;弦向压缩引起的力学强度损失大于径向压缩;随着压缩率的增大,力学强度损失增加;顺纹抗压强度变化的百分率为2.391%^-4.589%,顺纹抗剪强度变化的百分率为-2.071%^-14.213%,顺纹抗拉强度变化的百分率为2.246%^-11.535%,横纹抗拉强度变化的百分率为-0.217%^-16.877%,抗劈力变化的百分率为1.785%^-16.235%,抗弯强度变化的百分率为4.417%^-27.793%,抗弯弹性模量变化的百分率为1.045%^-19.455%,冲击韧性变化的百分率为3.413%^-28.929%。

The mechanics strength of Populus ussuriensis lumber compressed by rollers decreases a little, the loss which in tangential compression was more than that in radial one. The loss of mechanics strength increases with the rise of compression rate. The compressive strength parallel to the grain of wood was affected 2.391% - -4.589%, the shearing strength parallel to the grain was -2.071% - - 14. 213%, the Tensile strength parallel to the grain was 2.246% - -11. 535%, the tensile strength perpendicular to the grain was -0. 217% - - 16. 877%, the Cleavage strength of wood was 1. 785% - - 16. 235%, the bending strength of wood was 4. 417% - - 27. 793%, the modulus of elasticity in static bending was 1. 045% - - 19. 455%, and the toughness of wood was 3.413% - -28. 929%.