岩土力学2012，Vol.33Issue(7)：2076-2080,5.
一种新的岩石非线性黏弹塑性流变模型
A new nonlinear viscoelasto-plastic rheological model for rocks
宋勇军 1雷胜友 2韩铁林1
作者信息
- 1. 长安大学 公路学院,西安 710064
- 2. 西京学院 工程技术系,西安 710123
- 折叠
摘要
Abstract
By means of classic element combination modeling ideas, making fractional calculus soft-matter element and spring element in series and combining a visco-plastic body of power function, a new nonlinear viscoelasto-plastic rheological model with four elements is put forward. The constitutive equation and creep equation of the model are given and the creep curves in different stress conditions are obtained. It can be found that nonlinear gradual change process of steady creep phase and creep speed rate of accelerated creep stage of rock can be effectively simulated by adjusting creep parameters. In lower stress level, the model can describe the initial creep and steady creep of rocks. Moreover, if the stress level exceeds the long-term strength of rocks, the model can reflect the accelerated creep characteristics. The fitted results show that the nonlinear rheological model which contains soft-matter element and visco-plastic body of power function can effectively describe the creep properties of rocks and reduce the number of components and parameters of combination model.关键词
分数阶微积分/软体元件/非线性流变模型/加速蠕变Key words
fractional calculus/ soft-matter element/ nonlinear rheological model/ accelerated creep分类
建筑与水利引用本文复制引用
宋勇军,雷胜友,韩铁林..一种新的岩石非线性黏弹塑性流变模型[J].岩土力学,2012,33(7):2076-2080,5.
