A SELF‐ADAPTIVE ENERGY DISSIPATION STRUCTURE FOR LOW SPEED IMPACT AND PEDESTRIAN PROTECTION
Bibliographic record
Abstract
Bumper design regulations for low-speed vehicular impacts (Part 581, Bumper Standard, formerly FMVSS 215) and high-speed pedestrian impacts (ECE 127/GTR 9) possess a contradictory set of requirements. Essentially, an ideal bumper structure should be stiff under low-velocity vehicular impacts while exhibiting a softer response when impacting pedestrians at elevated velocities to satisfy both regulations. A series of energy absorbing structures capable of passively adapting their mechanical responses based on the loading conditions were investigated using finite element modelling tools which were validated to a series of experimental testing observations. The preferred structure consisted of a rectangular array of trapezoidal cells which buckle under single-cell impacts while resisting lateral deformation and artificially increasing the overall stiffness under large area impacts. A geometric study of this dissipater demonstrated the potential to increase total energy absorption by 37.3% by adding thin-walled crossbars at the bases of adjacent cells. Additionally, a parametric study identified a combination between upper cell angle and the ratio between the wall thicknesses as the most critical parameter to consider when tailoring the overall mechanical response.
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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) | 0.000 | 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".