Relation of Impact Factors and Propagation Parameter of Stress Wave in non-defect Poplar and Larch Logs
The testing experiments to non-defect poplar and larch logs samplings were conducted by using Arbotom and Fakopp stress wave testing instrument_ The relationships between radial and longitudinal propagation time, propagation velocity as well as dynamic modulus of elasticity of stress wave and moisture content, density and diameter were studied in the two logs samplings. The results indicated that, in the both species, the radial and longitudinal propagation time of stress wave had a positive linear correlation with moisture content moreover, the correlation coefficient between radial propagation time and moisture content was greater tban the longitudinal; and the radial and longitudinaJ propagation velocity of stress wave were influenced by the combined of moisture content and diameter, the radial propagation velocity had a positive linear correlation with moisture content and diameter, however, the longitudinal is quite the opposite, and the correlation coefficient between diameter and radial and longitudinal propagation velocity was greater than moisture content; and the dynamic modulus of elasticity was influenced markedly by the combined of moisture content, density and diameter.
poplar larch logs stress wave propargation parameter
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
2010 2nd International Conference on Signal Processing System(2010年信号处理系统国际会议 ICSPS 2010)
大连
英文
430-434
2010-07-05（万方平台首次上网日期，不代表论文的发表时间）