THERMAL SCIENCE

International Scientific Journal

Shengwei Li

,

Cunbao Li

,

Wei Yao

,

Ru Zhang

,

Jing Xie

,

Junchen Zhang

,

Qiang Liu

,

Zhaopeng Zhang

IMPACT OF WETTING-DRYING CYCLES ON DYNAMIC TENSILE STRENGTH OF ROCK

ABSTRACT
To study the effect of wetting-drying cycles on dynamic tensile strength of rock, dynamic indirect tension test of sandstone samples after 0, 1, 3, and 5 wetting-drying cycles was conducted. Tensile failure was observed by digital image correlation. The result shows that failure appears in the center of the samples initially, consistent with tensile strain field results obtained by digital image correlation. An empirical formula was derived to link loading rate and dynamic tensile strength of rock after wetting-drying cycles. As the loading rate increases, tensile strength increases significantly. Tensile strength reduces as the number of wetting-drying cycles increases. These results provide reference data for complex engineering problems such as those that occur in coal mining, tunneling and water conservancy.
KEYWORDS
sandstone, dynamic tensile strength, wetting-drying, Brazilian test, SHPB
PAPER SUBMITTED: 2018-04-11
PAPER REVISED: 2018-07-10
PAPER ACCEPTED: 2018-10-10
PUBLISHED ONLINE: 2019-04-14
DOI REFERENCE: https://doi.org/10.2298/TSCI180411115L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Supplement 3, PAGES [S815 - S820]
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Impact of wetting-drying cycles on dynamic tensile strength of rock

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