Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 134, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2020.105523
Keywords
Rock salt; Fatigue loading; Gas pressure; Damage; Computed tomography
Funding
- National Natural Science Fund [51834003, 51904039]
- Postdoctoral Science Foundation Project - State Key Laboratory of Coal Mine Disaster Dynamics and Control [2011DA105287-BH201901]
- Research Foundation of Chongqing University of Science and Technology [CK181901004]
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In this work, a series of fatigue tests combining cyclic loading and gas pressure on rock salt using the computed tomography (CT) scanning method was performed. Fatigue life under gas pressure showed a downward trend compared to the cases without gas pressure. Gray scale histograms could be used to reflect intuitively and accurately the propagation of damages inside rocks. Fatigue life and gas pressure followed a logarithmic relationship. Due to the wedge effect of gas pressure, gas could penetrate into the crack tips or pores, thus accelerating the development of micro-cracks during the cyclic opening and closure.
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