Directional plastic flow and fabric dependencies in granular materials
Bibliographic record
Abstract
The constitutive modelling of granular materials both at the microstructural level and the continuum level is well established. Much recent effort has been devoted to the theoretical mechanics and computer simulations of granular media through discrete element modelling (DEM). The current study uses DEM to obtain theoretical insights and extract constitutive information such as the nature of the yield and plastic flow behaviour of granular materials. In particular, we look at the influence of granular fabric on the plastic deformation response under a number of conditions. As such, a representative element volume (REV) of a granular material idealized as a numerical DEM sample is subjected to different loading paths to reach the same stress states, but with different fabrics, on the plastic failure surface. At this stage, directional stress probes of equal magnitudes are applied, so that the strain response envelopes thus obtained represent characteristics of the increment of plastic strain, i.e. the nature of the flow rule. The discussion then focuses on the relationship between fabric, stress state, loading path, direction of the plastic strain increment, and whether this direction can be considered unique or not.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".