Creep and Creep-Rupture of Polymer Composite Laminates
Why this work is in the frame
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Bibliographic record
Abstract
Creep and creep-rupture of uni-directional composite laminates were characterized and modelled. Individual and interactive influence of stress, temperature, moisture, and physical aging on creep and creep-rupture of a polymer composite (Hexcel F263 epoxy reinforced with 54% by volume of Toray T300 carbon fibers) were studied. The composite exhibited linear creep at constant stresses ≤ 7 MPa in the temperature range 295 – 503K. Moisture accelerated creep through plasticization (i.e. lower the Glass Transition Temperature, Tg) of the epoxy matrix and moisture-induced creep acceleration was found to be equal to creep acceleration in a dry sample by equivalent temperature increase. Moisture accelerated creep-rupture. Physical aging retarded creep and accelerated creep-rupture. In addition to reducing the moisture diffusivity and saturation moisture, physical aging caused a reduction in the magnitude of creep and creep-rupture acceleration by moisture when compared to non-aged material at the same moisture level. Similar interactive influence was observed at various stress and / or temperature levels. The data have been appropriately modelled and are currently being used in the modelling of creep and creep rupture of multi-directional laminates. The results of the modelling will be presented and discussed at the time of presentation.
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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) | 0.006 | 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 it