蒙古栎根系单根抗拉力学特性

李长暄; 陈丽华; 周娟; 郭文体

doi:10.13961/j.cnki.stbctb.2014.04.059

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蒙古栎根系单根抗拉力学特性

试验研究

- 蒙古栎根系单根抗拉力学特性
- Tensile Mechanical Properties of Single Root of Quercus Mongolica
- 水土保持通报 2014年33卷第4期页码：232-235
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
  
  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
- DOI：10.13961/j.cnki.stbctb.2014.04.059
  中图分类号：
- 纸质出版：2014
- 稿件说明：
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李长暄, 陈丽华, 周娟, 等. 蒙古栎根系单根抗拉力学特性[J]. 水土保持通报, 2014,33(4):232-235.

LI Chang-xuan, CHEN Li-hua, ZHOU Juan, et al. Tensile Mechanical Properties of Single Root of Quercus Mongolica[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 232-235.
李长暄, 陈丽华, 周娟, 等. 蒙古栎根系单根抗拉力学特性[J]. 水土保持通报, 2014,33(4):232-235. DOI： 10.13961/j.cnki.stbctb.2014.04.059.

LI Chang-xuan, CHEN Li-hua, ZHOU Juan, et al. Tensile Mechanical Properties of Single Root of Quercus Mongolica[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 232-235. DOI： 10.13961/j.cnki.stbctb.2014.04.059.

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。

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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references

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