Study on Velocities of Stress Wave Propagating in Standing Trees of Broadleaf and Needles Species
Introduction Stress wave nondestructive evaluation (hIDE) has been widely used for lumbers, logs, and even some wood products and mounts of researches were conducted in recent years while the very NDE method applying to the standing trees is still immature to predict the grade of trees before felling. In order to improve the ability of mechanical grading based on the traditionally established visual grading in cold area, especially in the northeast forest area of China, longitudinal velocities of stress wave propagating in standing trees in frozen and non-frozen status were measured and the determination data were analyzed via SPSS.
Wang Lihai Wang Yang Gao Shah
Engineering and Technology Department, Northeast University, Harbin, China
国际会议
International Symposium on Wood Science and Technology(IAWPS 2008)(国际木材产品学会联合会2008学术研讨会)
哈尔滨
英文
161-162
2008-09-27（万方平台首次上网日期，不代表论文的发表时间）