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Study on damage evolution of intact and jointed marble subjected to cyclic true triaxial loading
Gao, Yaohui; Feng, Xia-Ting
AbstractRock masses in underground engineering, such as mining and deep tunnelling engineering, are often repeatedly loaded and unloaded. Here, a series of true triaxial multi-level single cyclic loading tests (sigma(1) > sigma(2) > sigma(3)) were carried out on intact and jointed marble (50 x 50 x 100 mm(3)) to investigate the influence of the stress state and the absence or presence of a joint on the progressive damage process. The test results show that rock damage is directional and anisotropic. The irreversible strains in the sigma(1) and sigma(3) directions change linearly with cumulative damage, whereas the irreversible strains in the sigma(2) direction decrease nonlinearly. The dissipated energy is appropriately linearly related to the equivalent irreversible strains. The damage variables based on the irreversible strains and dissipated energy are closely correlated, as determined by their similar fitted parameters. The stress state (sigma(2) and sigma(3)), the absence or presence of a joint and the brittleness play a vital role in the rock damage evolution. More specifically, the parameter a has a logarithmic relationship with sigma(3) and a linear relationship with sigma(2). The relationship between the parameter a and the joint dip angle beta can be fitted by a Gaussian distribution. In addition, the fitted parameter a decreases with increasing brittleness.
KeywordTrue triaxial cyclic loading Damage variables Irreversible strain Dissipated energy Brittleness
Indexed BySCI
WOS Research AreaMechanics
WOS SubjectMechanics
WOS IDWOS:000470057600016
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Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China;
2.Northeastern Univ, Key Lab Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Liaoning, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Gao, Yaohui,Feng, Xia-Ting. Study on damage evolution of intact and jointed marble subjected to cyclic true triaxial loading[J]. ENGINEERING FRACTURE MECHANICS,2019,215(-):224-234.
APA Gao, Yaohui,&Feng, Xia-Ting.(2019).Study on damage evolution of intact and jointed marble subjected to cyclic true triaxial loading.ENGINEERING FRACTURE MECHANICS,215(-),224-234.
MLA Gao, Yaohui,et al."Study on damage evolution of intact and jointed marble subjected to cyclic true triaxial loading".ENGINEERING FRACTURE MECHANICS 215.-(2019):224-234.
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