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Shock and Vibration
/
2020
/
Article
/
Tab 4
/
Research Article
Study on Long-Term Dynamic Mechanical Properties and Degradation Law of Sandstone under Freeze-Thaw Cycle
Table 4
Dynamic compressive strength fitting formula of freeze-thaw cycle sandstone under different strain rates.
Strain rate (s
ā1
)
Fitting formula (
x
is the number of freeze-thaw cycles)
Correlation coefficient
R
200
0.978
380
0.999
580
0.998
750
0.997