| 毛竹竹材物理力学性能研究 |
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| 引用本文： | 李光荣,辜忠春,李军章.毛竹竹材物理力学性能研究[J].湖北林业科技,2014,43(5):44-49. |
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| 作者姓名： | 李光荣 辜忠春 李军章 |
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| 作者单位： | 湖北省林业科学研究院 武汉 430075 |
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| 摘 要： | 为了解不同竹龄毛竹生材含水率、线性干缩率、气干密度、抗弯强度、抗弯弹性模量和顺纹抗压强度等物理性能,对其加工应用的影响,笔者以2-7年生毛竹为材料进行研究,结果表明：竹材的生材含水率、气干干缩率（弦向、径向、纵向）和全干缩率（弦向、径向、纵向）随着竹龄的增加呈减小的趋势;从基部到梢部竹材的生材含水率、线性干缩率均减小;竹材线性干缩率弦向＞径向＞纵向.竹材气干密度、抗弯强度、抗弯弹性模量和顺纹抗压强度均随着竹龄的增加呈增大的趋势,尤其是3年生竹材的这些物理力学性能与2年生差异显著,但3年后生竹材差异不大;从基部到梢部竹材的气干密度、抗弯强度、抗弯弹性模量和顺纹抗压强度逐渐增加.综合考虑毛竹的物理力学性能和竹林的经济效益,适合采伐的是3年后生竹材,锯截之后的竹材也应根据部位不同进行区分,以便于加工应用过程中合理利用,提高产品的理化性能和质量的稳定性.
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| 关 键 词： | 毛竹 物理力学性能 干缩率 加工应用 |
Study on Physical and Mechanical Performance of Phyllostachy Pubescens |
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| Li Guangrong
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Gu Zhongchun
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Li Junzhang.Study on Physical and Mechanical Performance of Phyllostachy Pubescens[J].Hubei Forestry Science and Technology,2014,43(5):44-49. |
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| Authors: | Li Guangrong Gu Zhongchun Li Junzhang |
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| Institution: | (Hubei Academy of Forestry Wuhan a30075 ) |
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| Abstract: | In order to realize the relationship between green moisture content of bamboo, linear shrinkage rate, dry density, bending strength, elastic modulus of bending and compressive strength and the processing in utilization for two years to seven years Phyllostachy pubescens, which were studied by author. The result indicated that： green moisture con- tent of bamboo and linear shrinkage rate of bamboo were decreased with age. With the increase of height from root to top, moisture content of fresh bamboo and linear shrinkage rate of bamboo were also decreased. The linear shrinkage rate of bamboo in different directions follows the order of tangential direction〉radial direction〉longitudinal direction. Dry density, bending strength, elastic modulus of bending and compressive strength of Phyllostachy pubescens were increase with the increased age. The differences of physical and mechanical properties between two years bamboo and three years bamboo are significant while the differences among bamboos with longer than three years age are insignificant. With the increase of height from root to top, dry density, bending strength, elastic modulus of bending and compressive strength parallel to grain of the bamboo increased. Three years bamboo is most suitable for harvesting with respect to the physical and mechanical properties of bamboo, as well as the economical benefits of bamboo wood. And the cut bamboo should be classified according to the parts of bamboo, which can improve the physical/chemical performance and quality stability of bamboo product as well. |
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| Keywords: | Key words:Phyllostachy pubescens physical and mechanical properties dry shrinkage rate processing |
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