| 薄板类木质材料弹性模量的动态测定 |
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| 引用本文： | 张厚江,郭志仁,John F Hunt,傅峰.薄板类木质材料弹性模量的动态测定[J].北京林业大学学报,2010,32(2):149-152. |
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| 作者姓名： | 张厚江 郭志仁 John F Hunt 傅峰 |
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| 作者单位： | 1 北京林业大学工学院2 美国农业部林产品实验室3 中国林业科学研究院木材工业研究所 |
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| 基金项目： | “948”国家林业局引进项目(2008--4--69) |
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| 摘 要： | 传统的材料弹性模量测定方法都是对材料试件进行静态变形试验,测定过程复杂、消耗时间长。本文以快速测量薄板类木质材料弹性模量为目标,探讨了一种基于悬臂梁自由振动原理的动态无损快速测定方法,研制出1台测量装置样机。首先用垂直悬臂夹持薄板木质材料试件上端,然后对其自由端施加1个初始变形,使其自由振动起来。采集试件振动信号,分析计算出振动的第一阶固有频率和振幅对数减缩,进而计算出试件的动态性能。测定效果表明:测量装置样机达到了研发目的,能快速测量试件的动态弹性模量。
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| 关 键 词： | 薄板类木质材料 悬臂梁振动 弹性模量 |
| 收稿时间： | 1900-01-01 |
Measuring modulus of elasticity for thin wood composites using a dynamic method |
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| ZHANG Hou-jiang,GUO Zhi-ren,John F Hunt,FU Feng.Measuring modulus of elasticity for thin wood composites using a dynamic method[J].Journal of Beijing Forestry University,2010,32(2):149-152. |
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| Authors: | ZHANG Hou-jiang GUO Zhi-ren John F Hunt FU Feng |
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| Institution: | 1 School of Technology，Beijing Forestry University，100083，P.R.China; 2 USDA Forest Products Laboratory，WI 53726，USA; 3 Research Institute of Wood Industry，Chinese Academy of Forestry，Beijing，100091，P.R.China. |
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| Abstract: | Traditional testing for modulus of elasticity(MOE) of materials uses a static test method,which is long and complicated.To provide a rapid and non-destructive evaluation of MOE for small samples of thin wood composites,we discussed the fundamental theories of cantilever-beam vibration for MOE measurements and developed a testing device for cantilever-beam vibration.The equipment applies a known displacement to the free end of a vertical cantilever beam,releases the beam into its natural first mode vibration... |
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| Keywords: | thin wood composites cantilever-beam vibration modulus of elasticity(MOE) |
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