Fatigue statique de monofilaments et de fils SiC Hi-Nicalon à 500 °C et 800 °C
Bibliographic record
Abstract
Les composites de la famille des SiC/SiC sont sensibles a un phenomene de fatigue, a faible contrainte et aux temperatures intermediaires (500°C – 800°C). Des travaux anterieurs ont mis en evidence la rupture lente des fils SiC Nicalon, lorsqu’ils sont soumis a une charge constante inferieure a leur resistance a la rupture, a des temperatures de 600°C et 700°C. Le processus presente toutes les caracteristiques de la fissuration sous-critique, et il semble active par l’oxydation de la fibre. Cet article etudie la fatigue statique des fils et des monofilaments SiC Hi-Nicalon, aux temperatures de 500°C et 800°C. Les relations entre la duree de vie des monofilaments et celle des fils sont etablies. Des diagrammes SPT (Strength-ProbabilityTime) sont egalement construits. Il est montre que le modele fonde sur la loi de propagation sous-critique d’une fissure permet de decrire de maniere satisfaisante l’evolution de la contrainte a rupture des monofilaments, en fatigue statique a haute temperature. Le modele permet d’anticiper l’influence des caracteristiques des monofilaments.
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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 | 0.000 |
| 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) | 0.002 | 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".