典型文献
Spatially distributed damage in sandstone under stress-freeze-thaw coupling conditions
文献摘要：
In the present study,we tried to understand the spatially distributed damage in sandstone samples under the coupled stress-freeze-thaw(SFT)conditions.Firstly,uniaxial compressive stresses(i.e.0 MPa,10 MPa,20 MPa,and 25 MPa)were applied to the samples,and then freeze-thaw(FT)cycles(0,8,16,and 24)were performed on the uniaxially stressed samples to realize the SFT coupling.Next,real-time CT scanning was conducted to observe the induced damage.The total porosity was introduced to quanti-tatively evaluate the damage degree.The local porosity variation,with the distance from the center of the sandstone sample,was analyzed to understand the spatial distribution of damage.Finally,the coupling effects of SFT on the damage gradient were discussed.The results indicate that the porosity rises with FT cycles,and the applied stresses can accelerate the increase in porosity.The damage increases expo-nentially with the distance from the center of the sample.The damage presents a spatial gradient dis-tribution,not the commonly used uniform distribution in various studies.The damage gradient increases with FT cycles,and the increasing rate in damage gradient decreases at uniaxial stress of 0 MPa and 10 MPa first,but the increasing rate in damage gradient increases with FT cycles then at stress increasing to 20 MPa.
文献关键词：
中图分类号：
作者姓名：
Lifeng Fan;Yiding Fan;Yan Xi;Jingwei Gao
作者机构：
College of Architecture and Civil Engineering,Beijing University of Technology,Beijing,100124,China
文献出处：
引用格式：
[1]Lifeng Fan;Yiding Fan;Yan Xi;Jingwei Gao-.Spatially distributed damage in sandstone under stress-freeze-thaw coupling conditions)[J].岩石力学与岩土工程学报（英文版）,2022(06):1910-1922
A类：
uniaxially,nentially
B类：
Spatially,distributed,damage,sandstone,freeze,thaw,coupling,conditions,In,study,tried,understand,spatially,samples,coupled,SFT,Firstly,compressive,stresses,were,applied,then,cycles,performed,stressed,realize,Next,scanning,was,conducted,observe,induced,total,porosity,introduced,quanti,tatively,evaluate,degree,local,variation,distance,from,center,analyzed,distribution,Finally,effects,gradient,discussed,results,indicate,that,rises,accelerate,increases,expo,presents,not,commonly,used,uniform,various,studies,increasing,decreases,first
AB值：
0.377685
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
