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| 引用本文： | 张志研,赵东. ???????????????о?[J]. 力学与实践, 2009, 31(2): 74-77. DOI: 10.6052/1000-0879-2008-187 |
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| 作者姓名： | 张志研 赵东 |
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| 作者单位： | 北京林业大学工学院，北京 100083 |
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| 基金项目： | 北京市自然科学基金资助(2072013). |
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| 摘 要： | 木材声发射信号与其内外部损伤情况存在一定的定量关系. 依据损伤理论和含有裂纹以及缺陷的木材不同阶段的声发射特征，分别探讨并建立了受交变载荷和单向静载荷情况下以声发射特征参数表示的木材损伤演变模型. 分析结果与木材的实际情况相一致，表明以声发射特征参量建立的木材损伤演变模型对木材的损伤预测具有提前性与敏感性，而且木材的不均匀性是其提前破坏的主要原因之一.
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| 关 键 词： | 木材 微裂纹 声发射 损伤模型 |
| 收稿时间： | 2008-04-03 |
| 修稿时间： | 2008-07-20 |
STUDY ON THE ACOUSTIC EMISSION MODEL OF WOOD DAMAGE |
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| ZHANG Zhiyan , ZHAO Dong. STUDY ON THE ACOUSTIC EMISSION MODEL OF WOOD DAMAGE[J]. Mechanics and Engineering, 2009, 31(2): 74-77. DOI: 10.6052/1000-0879-2008-187 |
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| Authors: | ZHANG Zhiyan ZHAO Dong |
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| Affiliation: | 2;3;School of Technology;Beijing Forestry University;Beijing 100083;China |
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| Abstract: | There is a quantitative relationship between damage and acoustic emission in wood. Based on damagetheory and the acoustic emission signal in wood with defects and cracks indifferent damage phases, this paper establishes wood mechanics models ofdamage evolution under alternating load and static load,as two kinds of common situations. Analytical results agreewith lumber's actual situation. With specialcharacteristics of the acoustic emission, wood mechanics model of damageevolution with is established, which can be used to forecast thedamage in advance, and it is shown thatinhomogeneity is one of the main causes of damage. |
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| Keywords: | wood micro-crack acoustic emission model of damage |
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