Crashworthiness of High and Low Pressure Hydroformed Straight Section Aluminum Tubes
Bibliographic record
Abstract
<div class="htmlview paragraph">There exists considerable motivation to reduce vehicle weight through the adoption of lightweight materials while maintaining energy absorption and component integrity under crash conditions. Finite element simulations were performed based on impact tests with straight sections of AlMg3.5Mn aluminum alloy tubes that were hydroformed using a high or low pressure operation. A tube formed with the low pressure operation will experience considerably less strain or work hardening and will retain greater residual ductility compared to a tube formed under high pressure, with a trade-off being that the tube will have a smaller cross-section. In the high pressure process, tubes will likely experience more work hardening in the corner-fill region. The energy-absorption behaviour during impact can be affected by the work hardening, residual stresses, thickness changes, and shape of the cross-section after the hydroforming operation. It was found that the energy absorption during impact decreased with decreasing corner-fill radius of the hydroformed tube.</div>
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| 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 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".