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1- Shiraz University
2- Shiraz University ,rahimi_e@shirazu.ac.ir
3- Hamedan University of Technology,
2- Shiraz University ,
3- Hamedan University of Technology,
Abstract: (587 Views)
Numerical modeling is an essential tool in engineering analysis, particularly within the fields of geoscience and geotechnics. The PFC2D software stands out in this field, using the Distinct Element Method (DEM) to simulate processes related to engineering geology and geotechnical assessment. This study focuses on the analysis and comparison of two common contact models: the Flat Joint Model (FJM) and the Linear Parallel Bond Model (LPBM). The Unconfined Compressive Strength (UCS) test is chosen as a the benchmark for calibrating and validating the PFC models. Sandstone samples for this study are taken from the Aghajari Formation located on the southern limb of the Madar Anticline. The results show that both contact models have a high ability to simulate the UCS in the calibration process. As this test is primarily used to calibrate the failure point (σc) and Young's modulus, the output values for both models are almost identical. However, the post-failure behavior in the stress-strain curves differs between the models, with the FJM demonstrating a more brittle response compared to the LPBM. The ability of the FJM model to simulate rough surfaces and material discontinuities allows for the representation of tensile cracking.
Type of Study: Original Research |
Subject:
En. Geology
Received: 2024/11/10 | Accepted: 2024/12/16 | Published: 2024/12/30
Received: 2024/11/10 | Accepted: 2024/12/16 | Published: 2024/12/30
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