Mechanical behaviour of a hyperelastic pad for an integrated cross-tie trackwork system
Bibliographic record
Abstract
This paper presents the material characteristics and application of a hyperelastic pad used in an integrated cross-tie trackwork configuration, which is part of an advanced rapid transit (ART) system. The ART vehicle is powered by a linear induction motor (LIM); correspondingly, the steel cross-tie trackwork includes a LIM reaction rail as well as running rails to support the steel-wheeled vehicle. An elastomeric pad is placed under each end of the cross-tie to absorb the dynamic effects from the ART. The pad has been isolated from the integrated cross-tie system and tested to determine its material constants which are necessary for modeling of the cross-tie system. The pad is found to be nearly incompressible and demonstrates hyperelastic behaviour. The Mooney–Rivlin (three-term) model shows the best prediction of the pad behaviour among the five selected hyper-elasticity models and a simplified elastic foundation model also exhibits a reasonable engineering approximation. The contribution of variable pad stiffness values to the size of the required air gap between the LIM and the reaction rail, and to the fatigue life of welded connections in the cross-tie is studied.
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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".