Abstract
The debate on whether the creep failure is induced by a stress threshold or a strain threshold is studied on several soils in this paper with a power law model and a normalization curve. The analysis indicates: (a) the creep failure is based on a critical strain, which is obtained with a normalization curve; (b) the time to the creep failure is very long for a low stress level or a low creep exponent; (c) for a given time to the creep failure, the strain threshold could be converted to a stress threshold, and variable stress thresholds will be calculated for different times given to the creep failure; (d) the creep behavior of various materials could be compared with the normalization curve and the power law model.
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The authors appreciate the funding provided by Texas Department of Transportation, USA (6784), Natural Science Foundation of China (51808292), and Natural Science Foundation of Fujian, China (2020J01212259).
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G. Bi and D. Jiang formerly at Department of Civil Engineering, Texas A&M University, College Station, Texas, 77843, USA.
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Bi, G., Li, Z., Wang, Q. et al. An examination of creep failure criterion based on a strain threshold identified with a power law model. Mech Time-Depend Mater 26, 195–209 (2022). https://doi.org/10.1007/s11043-020-09483-9
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DOI: https://doi.org/10.1007/s11043-020-09483-9