文章基本信息

标题：A volume deformation model for brittle rock based on fractional order calculus
本地全文：下载
作者：he mingming ; Ning Li ; Yunsheng Chen 等
期刊名称：Mechanika
印刷版ISSN：1392-1207
出版年度：2017
卷号：23
期号：4
页码：500-505
DOI：10.5755/j01.mech.23.4.15119
语种：English
出版社：Kauno Technologijos Universitetas
摘要：In compression and tension of brittle rock, the dilatancy phenomena of volume deformation were often observed.This paper presents experimental investigation of volume deformation properties of brittle rock samples in triaxial compression and uniaxial tension tests in different strain rate and different temperature in the laboratory.Based on the viscoelasticity mechanics principle, it is found that the combined effects of elastic and viscoelastic are the basic reason of causing the dilatancy in brittle rock.Moreover, In order to depict the dilatancy phenomena of volume deformation through a simple model presented and have a correct modelization of mechanical behaviors, a volume deformation model is proposed, in which the variation of volume deformation resulted from the combined effects is characterized through a fractional order calculus expression.Comparison between fitting results and experimental results reveals the presented model can describe the dilatancy phenomena of volume deformation of brittle rock.
关键词：Volume deformation;dilatancy phenomena;Brittle rock;Fractional calculus;Mode