Fracture behavior and damage mechanisms of sandstone subjected to wetting-drying cycles

Title: Fracture behavior and damage mechanisms of sandstone subjected to wetting-drying cycles
Creator: Cai, Xin; Zhou, Zilong; Tan, Lihai; Zang, Haizhi; Song, Zhengyang
Relation: Engineering Fracture Mechanics Vol. 234, no. 107109
Publisher Link: http://dx.doi.org/10.1016/j.engfracmech.2020.107109
Publisher: Elsevier
Resource Type: journal article
Date: 2020
Description: Rocks are usually subjected to cyclic wetting-drying due to the periodical changes in moist condition. To investigate the effect of wetting-drying cycles on the fracture behavior of sandstone, notched semi-circular bending tests were performed on sandstone samples after every ten cycles (a total of 50 cycles) under both quasi-static and dynamic loading conditions. Tests results indicate that both of fracture toughness and energy dissipation of sandstone significantly decrease with the increase of cycle number. Moreover, the microstructural characteristics reveal that after cyclic wetting-drying treatments, the calcite cementation between grains gradually dissolves and the density and width of inter-granular fracture increase, which could be responsible for the deterioration of rock mechanical properties.
Subject: sandstone; cyclic wetting-drying; SHPB; NSCB; fracture toughness
Identifier: http://hdl.handle.net/1959.13/1454295
Identifier: uon:44894
Identifier: ISSN:0013-7944
Language: eng
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