Fatigue properties analysis of cracked rock based on fracture evolution process

Fracture evolution process (initiation, propagation and coalescence) of cracked rock was observed and the force—displacement curves of cracked rock were measured under uniaxial cyclic loading. The tested specimens made of sandstone-like modeling material contained three pre-existing intermittent cra...

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Bibliographic Details
Published inJournal of Central South University of Technology. Science & technology of mining and metallurgy Vol. 15; no. 1; pp. 95 - 99
Main Authors Zhang, Ping, Xu, Jian-guang, Li, Ning
Format Journal Article
LanguageEnglish
Published Changsha Central South University 01.02.2008
Subjects
Engineering
Metallic Materials
fatigue properties
cyclic loading
rock mechanics
fracture evolution
fatigue damage
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Summary:Fracture evolution process (initiation, propagation and coalescence) of cracked rock was observed and the force—displacement curves of cracked rock were measured under uniaxial cyclic loading. The tested specimens made of sandstone-like modeling material contained three pre-existing intermittent cracks with different geometrical distributions. The experimental results indicate that the fatigue deformation limit corresponding to the maximal cyclic load is equal to that of post-peak locus of static complete force-displacement curve; the fatigue deformation process can be divided into three stages: initial deformation, constant deformation rate and accelerative deformation; the time of fracture initiation, propagation and coalescence corresponds to the change of irreversible deformation.
ISSN:1005-9784
1993-0666
DOI:10.1007/s11771-008-0019-6