Relationship between log and lumber modulus of elasticity
Relationship between log and lumber modulus of elasticity
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DOI：
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发表时间：
1997
影响因子：
0.9
通讯作者：
R. Ross;K. A. Mcdonald;D. Green;K. C. Schad
中科院分区：
文献类型：
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作者：
R. Ross;K. A. Mcdonald;D. Green;K. C. Schad
过去的无损检测（NDE）研究工作已经为成功使用无损检测来确定成品木制品的质量铺平了道路。然而，在开发非目视无损检测技术以对原木的内部稳健性和结构质量进行分级或分类方面，几乎没有付出任何努力。本文描述了解决这个问题的一项研究的结果。采用纵向应力波无损检测技术对193根香脂冷杉和东部云杉原木加工成木材前的质量进行了评价。纵向应力波传输速度用于确定每条测井曲线的弹性模量（MOE）。然后使用横向振动无损检测技术确定从原木上切割的每块结构木材的MOE。观察到原木的MOE与从原木中获得的木材之间存在很强的关系。
Past nondestructive evaluation (NDE) research efforts have paved the way for the successful use ofNDE for determining the quality of finished wood products. However, little effort has been expended on developing nonvisual NDE techniques for use in grading or sorting logs for internal soundness and structural quality. This paper describes the results of a study that addressed this problem. Longitudinal stress wave NDE techniques were used to evaluate the quality of 193 balsam fir and eastern spruce logs prior to processing into lumber. Longitudinal speed-of-stress wave transmission was used to determine the modulus of elasticity (MOE) for each log. The MOE of each piece of structural lumber cut from the logs was then determined using transverse vibration NDE techniques. A strong relationship was observed between the MOE ofthe logs and the lumber obtained from the logs.