Experimental study on fatigue mechanical properties of sandstone after dry and wet cycle

• Autorzy: Jin-Song Zhang , Yu Lu , Heng-Liang Zhang , Yu-Di Yang , Yi-Shun Bu

Identyfikatory

DOI

10.24425/ace.2022.143044

• Języki publikacji: EN

Abstrakty

EN

At present, many studies have been carried out on the fatigue mechanical properties of conventional rocks, but there are few studies on the mechanical properties of rocks after water rock interaction. The aim is to better study the fatigue mechanical characteristics of sandstone after dry wet cycle and the research object we take was sandstone samples after a certain number of drying and wetting cycles. The WAW-2000 electro-hydraulic servo pressure system was used to carry out uniaxial fatigue cyclic loading and unloading tests with different amplitudes and different upper limit stresses. The test found that: when the sample is damaged under fatigue load, the stress-strain curve shows a sharp downward trend and a sudden instability failure occurred in the sample. With the increase of the upper limit stress and amplitude, the life of the sample decreases gradually which also conforms to the change of power function. Then the relationship between fatigue life and stress is obtained. The fatigue stress-strain curve is characterized by sparse-dense-sparse. With the increase of cycle time, the axial strain of the sample shows an inverted “S” shape. The strain change can be divided into three stages: initial stage, constant velocity stage and acceleration stage.

Słowa kluczowe

EN

cyclic loading; dry-wet cycle; fatigue characteristics; rock mechanics; sandstone

PL

obciążenie cykliczne; cykl nawilżanie-wysychanie; charakterystyka zmęczeniowa; mechanika skał; piaskowiec

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2022
• Tom: Vol. 68, nr 4
• Strony: 377--387
• Opis fizyczny: Bibliogr. 21 poz., il., tab.

Twórcy

autor

Jin-Song Zhang

• Anhui University of Science and Technology, Huainan City, Anhui Province

• https://orcid.org/0000-0003-4860-3567

autor

Yu Lu

• Anhui University of Science and Technology, Huainan City, Anhui Province

• https://orcid.org/0000-0003-4673-3018

autor

Heng-Liang Zhang

• First Design and Research Institute MI China Co, Hefei Economic and Technological Development Zone, Anhui Province

• https://orcid.org/0000-0001-9508-841X

autor

Yu-Di Yang

• Anhui University of Science and Technology, Huainan City, Anhui Province

• https://orcid.org/0000-0002-0195-6528

autor

Yi-Shun Bu

• Anhui University of Science and Technology, Huainan City, Anhui Province

• https://orcid.org/0000-0003-1130-2322

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