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Effects of cyclic dynamic loading on the mechanical properties of intact rock samples under confining pressure conditions
Liu, Enlong2; He, Siming1
Corresponding AuthorHe, Siming
2012
Source PublicationENGINEERING GEOLOGY
ISSN0013-7952
Volume125Pages:81-91
SubtypeArticle
AbstractA series of laboratory tests were performed to assess the effects of confining pressure on the mechanical properties and fatigue damage evolution of sandstone samples subjected to cyclic loading. Six levels of confining pressure (2.0, 10.0, 20.0, 30.0, 40.0 and 50.0 MPa) were applied during axial cyclic loading at a 1.0 Hz frequency using a MTS-815 Rock and Concrete Test System. Results from the cyclic dynamic loading tests indicated that the level of confining pressure had a significant influence on the cyclic dynamic deformation and fatigue damage evolution of the sandstone samples tested. With increasing confining pressure, the axial strain at failure increased. as did the residual volumetric strain at the initiation of dilatancy. The residual axial strains of sandstone samples obtained at a confining stress state can be described as three deformational stages, namely, the initial phase, uniform velocity phase and accelerated phase. Both the residual strain method and the axial secant modulus method proposed here could be used to describe the initial fatigue damage and degradation process of sandstone samples subjected to fatigue loading under a confining stress state; however, the latter also considers the influence of stress level on fatigue damage evolution when fatigue loads are applied. At a constant confining pressure, the shear fracture plane can form under static and cyclic dynamic loading conditions, and the higher the confining pressure, the wider the shear fracture planes become under cyclic dynamic loadings. (C) 2011 Elsevier B.V. All rights reserved.
KeywordFatigue Damage Evolution Cyclic Dynamic Loading Confining Pressure Cyclic Dynamic Stiffness
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.enggeo.2011.11.007
WOS Subject ExtendedEngineering ; Geology
Indexed BySCI
WOS KeywordFATIGUE PROPERTIES ; SANDSTONE SAMPLES ; STRAIN-RATE ; STRENGTH ; BEHAVIOR
Language英语
Quartile4区
TOP
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000301617700009
Funding OrganizationKey Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Science
Citation statistics
Cited Times:111[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/9910
Collection山地灾害与地表过程重点实验室
Affiliation1.CAS, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Peoples R China
2.Sichuan Univ, Coll Water Resources & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China
Recommended Citation
GB/T 7714
Liu, Enlong,He, Siming. Effects of cyclic dynamic loading on the mechanical properties of intact rock samples under confining pressure conditions[J]. ENGINEERING GEOLOGY,2012,125:81-91.
APA Liu, Enlong,&He, Siming.(2012).Effects of cyclic dynamic loading on the mechanical properties of intact rock samples under confining pressure conditions.ENGINEERING GEOLOGY,125,81-91.
MLA Liu, Enlong,et al."Effects of cyclic dynamic loading on the mechanical properties of intact rock samples under confining pressure conditions".ENGINEERING GEOLOGY 125(2012):81-91.
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