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Setting up virgin stress conditions in discrete element models
J Rojek1, G F Karlis2, L J Malinowski2
1Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland.
Computers and Geotechnics
|April 19, 2016
Summary
A new method converts pre-excavation stresses into contact forces for discrete element models (DEM). This approach accurately sets up virgin stress conditions in DEM simulations of underground excavations.
Area of Science:
- Geotechnical Engineering
- Computational Mechanics
Background:
- Discrete Element Method (DEM) models require contact forces, not stresses, for simulations.
- Accurately representing in-situ stress conditions (virgin stress) is crucial for modeling underground excavations.
Purpose of the Study:
- To propose a novel methodology for establishing virgin stress conditions in DEM models.
- To develop an algorithm for converting macroscopic stresses into equivalent contact forces for DEM.
Main Methods:
- Review and critical assessment of existing methods for setting up virgin stress conditions in DEM.
- Development and application of a new algorithm for stress-to-force conversion in DEM.
Main Results:
- The proposed method successfully sets up virgin stress conditions in DEM models.
- Test examples demonstrate the effectiveness of the algorithm across various DEM domain shapes.
Conclusions:
- The developed methodology provides a reliable way to initialize DEM models with appropriate virgin stress states.
- This facilitates more accurate numerical simulations of underground excavations using DEM.
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