Numerical simulation of the influence of porosity on rock mechanical properties and energy dissipation

The ABAQUS software was used to simulate the triaxial compression test of rocks. Using Python programming scripts to achieve random deletion of units, thereby obtaining loading models with different porosities. Based on actual triaxial compression test data, numerical simulations are conducted to an...

Celý popis

Uloženo v:
Podrobná bibliografie
Vydáno v:Journal of physics. Conference series Ročník 3006; číslo 1; s. 12016 - 12021
Hlavní autoři: Wang, Yanwei, Qu, Kai, Fu, Jiang
Médium: Journal Article
Jazyk:angličtina
Vydáno: Bristol IOP Publishing 01.05.2025
Témata:
Compression tests
Data compression
Elastic deformation
Energy dissipation
Failure
Heat treating
Internal energy
Mechanical properties
Modulus of elasticity
Porosity
Python
Rocks
Strain energy
Strain localization
Triaxial compression tests
ISSN:1742-6588, 1742-6596
On-line přístup:Získat plný text
Tagy: Přidat tag
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
Popis
Shrnutí:The ABAQUS software was used to simulate the triaxial compression test of rocks. Using Python programming scripts to achieve random deletion of units, thereby obtaining loading models with different porosities. Based on actual triaxial compression test data, numerical simulations are conducted to analyze the mechanical properties and energy dissipation evolution of rocks during loading. The results show that: ① With the increase of porosity, the elastic modulus, peak stress, and their corresponding internal energy and elastic strain energy all decrease linearly. ② When the pore volume in the rock is small, shear failure occurs, forming a distinct strain localization band. After the peak stress, the stress in the rock rapidly decreases, exhibiting brittle failure. Rocks with more pores exhibit multiple localized strain bands during failure, making them more fragmented. The stress after peak strength slowly decreases, exhibiting ductile failure characteristics. With the increase of porosity, the internal energy and elastic strain energy gradually decrease. After reaching the peak stress, the internal energy and plastic dissipation energy steadily increase, and the elastic strain energy is partially released. The release amount and release rate decrease due to the increase in rock porosity, and the severity of rock failure weakens. At the initial stage of loading, elastic deformation of the rock is the main cause, and at this time, the plastic dissipation energy is close to zero. When the stress reaches a certain value, the plastic dissipation energy slowly increases and rapidly increases near the peak stress until the rock fails.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/3006/1/012016