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应用C++语言编写的简易数值试验程序,模拟了岩石单轴拉伸的蠕变过程。试验中采用分级加载的方法,分析了不同拉应力条件下岩石的粘滞系数与应力和时间的关系,并推出了岩石非线性粘滞系数的函数关系式。随着应力的增加,粘滞系数与应力满足反正切三角函数关系,同时随着时间的延续,粘滞系数变化率与时间也满足对数函数关系。结果表明:岩石蠕变过程是典型非线性行为,建议采用非线性流变力学进行研究。
A simple numerical test program written in C ++ language was used to simulate the creep process of rock under uniaxial tension. In the experiment, the grading loading method was used to analyze the relationship between the rock viscous coefficient and stress and time under different tensile stress and the function formula of rock nonlinear viscous coefficient was deduced. With the increase of stress, the viscous coefficient and stress satisfy the trigonometric function of arc tangent. Meanwhile, with the extension of time, the change rate of viscous coefficient and the time also satisfy the logarithmic function. The results show that the rock creep process is a typical nonlinear behavior, and the nonlinear rheological mechanics is suggested.