Fail-safe Approach for the V-22 Composite Proprotor Yoke
Bibliographic record
Abstract
The V-22 proprotor yoke is fabricated from filament-wound unidirectional glass/epoxy belts that react to centrifugal force (CF) loads and beam and chord bending loads. Fiberglass tape is laid up at off-axis orientation between the unidirectional belts to react shear loads. The structural criteria for both metallic and composite V-22 dynamically loaded rotor components specify that these components be fatigue tested and analyzed to show a “safe life” of 30 000 h. Based on the fatigue test results of prototype and production proprotor yokes, a safe life of 30 000 h for the composite proprotor yoke could not be substantiated. However, testing of the yoke was continued beyond delamination initiation. The V-22 proprotor yoke continued to carry load in the fatigue tests with significant delaminations within the composite structure. These results, in addition to similar test results produced by Bell Helicopter Textron on composite proprotor yokes for commercially produced aircraft, indicate that it will be possible to substantiate this component using a “fail-safe” methodology.
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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) | 0.002 | 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 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".