典型文献
Uncovering the creep deformation mechanism of rock-forming minerals using nanoindentation
文献摘要：
The creep phenomenon of rocks is quite complex and the creep mechanisms are far from being well understood.Although laboratory creep tests have been carried out to determine the creep deformation of various rocks,these tests are expensive and time-consuming.Nanoindentation creep tests,as an alter-native method,can be performed to investigate the mechanical and viscoelastic properties of granite samples.In this study,the reduced Young's modulus,hardness,fracture toughness,creep strain rate,stress exponent,activation volume and maximum creep displacement of common rock-forming minerals of granite were calculated from nanoindentation results.It was found that the hardness decreases with the increase of holding time and the initial decrease in hardness was swift,and then it decreased slowly.The stress exponent values obtained were in the range from 4.5 to 22.9,which indicates that dislocation climb is the creep deformation mechanism.In addition,fracture toughness of granite's rock-forming min-erals was calculated using energy-based method and homogenization method was adopted to upscale the micro-scale mechanical properties to macro-scale mechanical properties.Last but not least,both three-element Voigt model and Burgers model fit the nanoindentation creep curves well.This study is beneficial to the understanding of the long-term mechanical properties of rock samples from a micro-scale perspective,which is of great significance to the understanding of localized deformation processes of rocks.
文献关键词：
中图分类号：
作者姓名：
Zhaoyang Ma;Chengpeng Zhang;Ranjith Pathegama Gamage;Guanglei Zhang
作者机构：
Deep Earth Energy Laboratory,Building 60,Monash University,Melbourne,Victoria 3800,Australia;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China;Department of Earth Science and Engineering,Imperial College London,London SW7 2BP,UK
文献出处：
引用格式：
[1]Zhaoyang Ma;Chengpeng Zhang;Ranjith Pathegama Gamage;Guanglei Zhang-.Uncovering the creep deformation mechanism of rock-forming minerals using nanoindentation)[J].矿业科学技术学报（英文版）,2022(02):283-294
A类：
erals
B类：
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AB值：
0.521709
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