| 蒙古栎根系单根抗拉力学特性 |
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| 引用本文： | 李长暄,陈丽华,周娟,郭文体.蒙古栎根系单根抗拉力学特性[J].水土保持通报,2014(4):232-235. |
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| 作者姓名： | 李长暄 陈丽华 周娟 郭文体 |
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| 作者单位： | 北京林业大学水土保持学院水土保持与荒漠化防治教育部重点试验室, 北京 100083;北京林业大学水土保持学院水土保持与荒漠化防治教育部重点试验室, 北京 100083;北京林业大学水土保持学院水土保持与荒漠化防治教育部重点试验室, 北京 100083;北京林业大学水土保持学院水土保持与荒漠化防治教育部重点试验室, 北京 100083 |
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| 基金项目： | 林业公益性行业科研专项项目"森林对PM2.5等颗粒物的调控功能与技术研究"(20130430104); 中国教育部博士基金项目(20090014110002); 国家自然科学基金项目 |
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| 摘 要： | 为探究蒙古栎根系的基本力学性质,对试验机夹具进行了改进并对根进行了预处理。选取直径范围为1~17 mm的蒙古栎根系在不同标距下进行了室内单根拉伸试验。结果表明,根系的抗拉力随直径的增大而增大,且呈显著的幂函数关系;抗拉强度随直径增加呈减小趋势;蒙古栎单根应力应变曲线在各个径级下皆为单峰曲线,呈弹塑性材料特征。说明蒙古栎通过其较强的抗拉性能和变形能力可对维持坡面稳定起到了积极作用。
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| 关 键 词： | 蒙古栎根系 室内拉伸试验 抗拉强度 应力-应变曲线 |
| 收稿时间： | 2013/12/10 0:00:00 |
| 修稿时间： | 2013/12/20 0:00:00 |
Tensile Mechanical Properties of Single Root of Quercus Mongolica |
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| LI Chang-xuan,CHEN Li-hu,ZHOU Juan and GUO Wen-ti.Tensile Mechanical Properties of Single Root of Quercus Mongolica[J].Bulletin of Soil and Water Conservation,2014(4):232-235. |
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| Authors: | LI Chang-xuan CHEN Li-hu ZHOU Juan and GUO Wen-ti |
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| Institution: | Key Lab. of Soil & Water Conservation and Desertification Combating Ministry of Education, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Key Lab. of Soil & Water Conservation and Desertification Combating Ministry of Education, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Key Lab. of Soil & Water Conservation and Desertification Combating Ministry of Education, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;Key Lab. of Soil & Water Conservation and Desertification Combating Ministry of Education, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China |
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| Abstract: | In order to explore the mechanical property of Quercus mongolica roots, the drawing machine fixture was improved and the roots were preprocessed before the test, and Quercus mongolica roots of which diameter between 1 and 17 mm were picked out to conduct single root tensile test indoor under different gauge length. The results show that tensile resistance of Quercus mongolica roots increase with the increase of root diameter according to a power function, and its tensile strength decreased with the increase of root diameter. Moreover, the stress-strain curve of single Quercus mongolica root was a single-peak curve under different diameter class which exhibiting the elastic-plastic material characteristics. It indicates that the Quercus mongolica root has positive effects on maintaining slope stability through strong ability of tensile properties and deformation ability. |
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| Keywords: | Quercus mongolica roots indoor tensile test tensile strength stress-strain curve |
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