Experimental Research on Different Propagation Velocity of Stress Wave in Poplar and Larch Logs
The testing experiments to poplar and larch logs samplings were conducted by using Arbotom and Fakopp stress wave testing instrument. The relationships among radial, tangential and longitudinal (heartwood and sapwood) propagation velocity of stress wave in the two logs samplings, and between radial velocity and diameter, as well as tangential velocity and the detection angle were studied. The results indicated that, in the both species, the radial velocity of stress wave had positive correlation with diameter, and that the longitudinal propagation velocity in the sapwood was larger than in the corresponding heartwood, and that tangential velocity had a quadratic function relation with the detection angle. In addition, experimental analysis showed the ratio thresholds between longitudinal heartwood and sapwood and radial velocity separately.
poplar larch logs stress wave different propagation velocity
Juying Luo Xuechun Yang
Key Laboratory of Forest Sustainable Management and Environmental Microorganism Engineering of Heilongjiang Province Northeast Forestry University Harbin,China
国际会议
长春
英文
13-16
2010-08-24（万方平台首次上网日期，不代表论文的发表时间）