New methodologies for characterization and modelling of filament wounded composite pressure vessels
Bibliographic record
Abstract
This paper describes research activities carried out in the field of Composite Overwrapped Pressure Vessels (COPV), with the goal to develop an accurate modelling methodology for the dome area. Different aspects are considered: material characterization at coupon level for a structure with curvatures, and definition of an adapted so called “soccer-ball mandrel” that presents flat faces; identification of the parameters of a specific material model that can account for progressive damage and permanent deformation; development of a methodology for modeling with FEM coupons extracted from the dome area, in shell and 3D-solid elements formulations; prediction of multi-sequence lay-up thickness coming from the filament winding process, in an axisymmetric representation, accounting for interaction with the boss; FEM simulation of the filament winding process, in order to better understand the behavior of the tapes deposited during filament winding. Good agreements are obtained between modeling/simulations and tests/measurements.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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".