NDLI: Study on Damage Constitutive Model of Rock under Freeze-Thaw-Confining Pressure-Acid Erosion

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Study on Damage Constitutive Model of Rock under Freeze-Thaw-Confining Pressure-Acid Erosion

Content Provider	MDPI
Author	Chen, Youliang Xiao, Peng Du, Xi Wang, Suran Fernandez-Steeger, Tomas Manuel Azzam, Rafig
Copyright Year	2021
Description	Aiming at the acid-etched freeze-thaw rock for geotechnical engineering in cold regions, chemical damage variables, freeze-thaw damage variables, and force damage variables were introduced to define the degree of degradation of rock materials, the law of damage evolution, the total damage variable of acid-corroded rock under the coupling action of freeze-thaw and confining pressure was deduced. The continuous damage mechanics theory was adopted to derive the damage evolution equation and constitutive model of acid-eroded rock under the coupling action of freeze-thaw and confining pressure. The theoretical derivation method was used to obtain the required model parameter expressions. Finally, the model’s rationality and accuracy were verified by the triaxial compression test data of frozen-thawed rocks. Comparing the test curve’s peak point with the peak point of the model theoretical curve, the results show that the two are in suitable agreement. The damage constitutive model can better reflect the stress-strain peak characteristics of rock during triaxial compression, verifying the rationality and reliability of the model and the method for determining the model parameters. The model extends the damage model of rock under the coupling action of freeze-thaw and confining pressure in the chemical environment and further reveals the damage mechanism and failure law of acid-corroded rock under the coupling action of freeze-thaw and confining pressure.
Starting Page	9431
e-ISSN	20763417
DOI	10.3390/app11209431
Journal	Applied Sciences
Issue Number	20
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-10-11
Access Restriction	Open
Subject Keyword	Applied Sciences Geological Engineering Mining and Mineral Processing Rock Mechanics Acid Corrosion Freeze-thaw and Confining Pressure Coupling Effect Damage Evolution Constitutive Model
Content Type	Text
Resource Type	Article

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