狗牙根根系抗拉性能试验

Study on the Tensile Performance of Cynodon dactylon Roots

以云南省典型护坡植物狗牙根为研究对象,使用万能试验机对其进行单根拉伸,研究了根系直径、最大抗拉力、最大抗拉强度相关关系。结果表明:狗牙根根系的拉力-位移曲线表现为直线型、上凸型、持续波动型等类型;狗牙根根系抗拉力、抗拉强度与根系直径的关系可分别应用幂函数、二次多项式及Logistic模型进行拟合,相关系数均高于0.9和0.7;狗牙根根系的抗拉力与抗拉强度随根系直径增加分别有增大和减小的趋势,意味着根系的抗拉力、抗拉强度与根系直径分别呈正相关以及负相关关系。

Taking Cynodon dactylonroots as the research objects,using a universal testing machine for single stretch to study the diameter relationship with the maximum tensile force and the maximum tensile strength.The results showed that the tensile force-displacement of Cynodon dactylonroots showed the type of linear,convex and continuous wave.The tensile force and the tensile strength relationship with the diameter could be fitting used by power function,quadratic polynomial and logistic model respectively,the correlation coefficient were higher than 0.9and 0.7.The root of tensile force and the tensile strength increased and decreased respectively with the root diameter enlarging,through the fitting,the roots tensile force showed positive function correlated relation with the root diameter,the tensile strength showed negative function relation with the root diameter.