Effects of Repeated Combined Tension and Shear Forces on Mechanical Properties of

LI Ruishen; LIU Jing; WANG Bo; ZHANG Xin; HU jinghua; SU Huimin; BAI Luyi; WANG Duomin

doi:10.13870/j.cnki.stbcxb.2019.05.018

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Effects of Repeated Combined Tension and Shear Forces on Mechanical Properties of

更新时间：2025-03-12

- Effects of Repeated Combined Tension and Shear Forces on Mechanical Properties of
- Vol. 33, Issue 5, Pages: 121-125(2019)
- 作者机构：
  
  1. 内蒙古农业大学,呼和浩特,010019
  2. 内蒙古自治区林业科学研究院,呼和浩特,010010
  3. 水利部牧区水利科学研究所,呼和浩特,010010
  4. 内蒙古阿拉善盟气象局, 内蒙古阿拉善盟,737300
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2019.05.018
  CLC：
- Published：2019
- 稿件说明：
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LI Ruishen, LIU Jing, WANG Bo, et al. Effects of Repeated Combined Tension and Shear Forces on Mechanical Properties of[J]. 2019, 33(5): 121-125.
DOI：

LI Ruishen, LIU Jing, WANG Bo, et al. Effects of Repeated Combined Tension and Shear Forces on Mechanical Properties of[J]. 2019, 33(5): 121-125. DOI： 10.13870/j.cnki.stbcxb.2019.05.018.

摘要

以1~5 mm小叶锦鸡儿（Caragana microphylla）直根为研究对象，采用TY 8000伺服式强力机研究50次加载（荷载为试验根极限抗拉剪组合力的70%）对其材料力学特性的影响。结果表明：承受50次加载后，试验根极限力-径向位移曲线斜率大于对照根；试验根极限抗拉剪组合力及其强度显著高于对照根（p<0.05）。反复加载后试验根抗拉剪组合力-根径的函数关系、抗拉剪组合强度-根径的函数关系均与对照根相似，仍分别呈幂函数正相关、幂函数负相关。随着根径由1~2 mm增至4~5 mm，试验根极限抗拉剪组合力由对照根的1.26倍增至1.34倍。随着加载次数的增加，试验根径向位移增量减小。

Abstract

Taking the 1~5 mm straight roots of Caragana microphylla as the research object

the effects of 50 times of loading (70% of the ultimate tensile-shear combined force of the test roots) on the mechanical properties were studied using TY 8000 servo-type strength machine. The results showed that the slope of the ultimate force-radial displacement curve of the test roots was larger than that of the control after 50 times of loading

and the ultimate tensile-shear combined force and strength of the test roots were significantly higher than thsoe of the control roots (p<0.05). After repeated loading

both the function relationship between the combined tensile and shear forces and diameters and the function relationship between the combined tensile and shear strength and diameters of the test roots were similar to those of the control

but still showed a positive and a negative power function correlation

respectively. With the increase of root diameters from 1~2 mm to 4~5 mm

the ultimate tensile-shear combined force of test roots increased from 1.26 to 1.34 times of the control. With the increase of loading times

the increment of radial displacement of test root decreased.

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