Damage and microstructural change in geophysical materials under high compression and shear
Bibliographic record
Abstract
Recent developments in studies of the mechanics of progressive breakdown of structure in geophysical materials under compression are discussed. Ice has been used as a reference material in experimental studies. The breakdown occurs under high stresses comprising both hydrostatic pressure and shear in zones that form as a result of fracture processes without geostatic pressure. The change in structure includes extensive microcracking and recrystallization at lower confining pressure and recrystallization together with other softening processes at higher confining pressures. The latter include pressure melting in the case of ice. The softening process at higher confining pressures leads to a cyclic failure process at certain loading rates. The m1crofracturing and recrystallization at lower pressures are similar to cataclasis, while the recrystallization at high pressures is similar to mylonlle formation in geology. Computer analysis of the process of interaction with mdenters has been conducted using the methods of damage mechanics, with positive results.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".