摘要
一般而言,岩石的蠕变全过程可以分为几个阶段,即初始的衰减蠕变阶段,到中间的稳定蠕变阶段,再到最后的加速蠕变阶段,直至岩样破坏.以往的大多数基于元件组合的模型只能有效的模拟前两个阶段,不能很好的模拟加速蠕变阶段.本文在Burgers元件模型的理论基础上,引进损伤体理论模拟加速蠕变阶段,与Burgers元件模型串联组合构建出能够有效模拟岩石全过程蠕变特征的组合模型,推导出蠕变本构方程.最后,将理论推导的蠕变本构方程用试验曲线拟合确定模型参数,并将理论曲线与试验曲线对比分析,表明所构建蠕变模型的合理性与可行性.
In general,the creep process of rock can be divided into several stages,namely the initial attenuation creep stage,the middle stable creep stage,to the last stage of accelerating creep,until the rock damage.In the past,most element combination model can effectively simulate the first two stages,but can＇t well simulate acceleration creep stage.Based on the theory of Burgers component model,this paper introduces the damage body theory to simulate accelerating creep stage;it can effectively simulate the whole process of rock creep characteristics with series combination of Burgers components model,and deducing the creep constitutive equation.Finally,determining model parameters of the creep constitutive equation derived from the theory with the test curve,by comparative analysis of theoretical curve with test curve,it is shown that the established creep model is reasonable and feasible.
出处
《三峡大学学报（自然科学版）》
CAS
2016年第3期32-35,共4页
Journal of China Three Gorges University：Natural Sciences
基金
973项目(2011CB013504)
留学回国人员科研启动基金(51103312)
