摘要
根据岩石加速蠕变阶段的力学特性,提出用非线性牛顿体替代线性牛顿体,建立改进的西原模型,并导出改进后模型的本构方程.将非线性问题通过局部线性化,得到改进的西原模型的稳定性条件.通过对蠕变、蠕变速度、蠕变加速度的控制变量渐变分析表明,改进的西原模型能够较好地描述岩石三阶段蠕变变形,尤其是非线性加速阶段蠕变变形.
In order to describe the accelerated creep property of the rock, the modified Xiyuan model has been established by using the non_linear N element to replace the linear one. Then its constitutive equation is derived. In the local scope, non_linear creep question is transferred into linear one, and the stability condition of the modified model is obtained. With analysis of the control variables of the creep deformation, the creep speed and the creep acceleration, the modified Xiyuan model can be used to better describe the three stages of rock sample creep, especially the non_linear accelerating creep stage.
出处
《河南理工大学学报（自然科学版）》
CAS
2005年第1期22-24,共3页
Journal of Henan Polytechnic University（Natural Science）
基金
教育部高等学校骨干教师资助计划项目(2096).
