水文地质工程地质2017，Vol.44Issue(3)：49-54,60,7.DOI:10.16030/j.cnki.issn.1000-3665.2017.03.08
软岩非线性蠕变损伤模型及其试验研究
Nonlinear creep damage model of soft rock and its experimental study
摘要
Abstract
In order to reflect the whole process of soft rock creep,the red mudstone creep experiment is carried out.The experimental results show that the elastic modulus gradually decreases with the increasing time and the viscosity coefficient gradually increases with the increasing time under the constant stress before yield.Therefore,this paper argues that the processing method of creep damage in the traditional theoretical rheology is not applicable to the damage evolution of the viscous coefficient,and the fractional calculus is used to describe the viscoelastic and viscoplastic strain of soft rock creep.By constructing an elastic body based on time-dependent damage,which is in series with a viscous body and a viscoplastic body based on fractional calculus,a new nonlinear creep damage model is established.The creep test data of red mudstone,frozen soft rock and red sandstone are identified with the creep damage model of soft rock,and the rationality and applicability of the proposed model is shown.关键词
蠕变/弹性模量/黏滞系数/蠕变损伤模型/分数阶微积分Key words
creep/elastic modulus/viscosity coefficient/creep damage model/fractional calculus分类
建筑与水利引用本文复制引用
黄海峰,巨能攀,黄敏,张成强,朱俊霖..软岩非线性蠕变损伤模型及其试验研究[J].水文地质工程地质,2017,44(3):49-54,60,7.基金项目
国家自然科学基金项目资助(41372306) （41372306）
