Mechanical Analyses of Multi-piece Mining Vehicle Wheels to Enhance Safety
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Notice bibliographique
Résumé
In this research, experimental and numerical methods were used to analyse the performance of multi-piece wheel structures and two proposed innovative designs to enhance safety were validated by computer simulations. Fatality report analyses revealed that the majority (90%) of the multi-piece wheel failures were caused by use of lock rings. Experimental tire and rim base tests were conducted to understand the deflection characteristics of off-the-road tires and to validate the finite element model of a five-piece wheel/tire (sized 29.5-29) assembly. A linear relationship was found between the vertical displacement of the wheel and the maximum lateral deflection of the tire for both static and quasi static loading tests. A robust tire model was validated with an average accumulative error of 9.7% and an average validation metric of 0.96 for tire deflections, compared to the experimental tests. The rim base model was validated with an average error of 7.6% and an average validation metric of 0.93 for wheel deformations, and an average accumulative error of 12.7% and an average validation metric of 0.88 for strains, compared to experimental tests. Based on validated FE model of the five-piece wheel/tire assembly, geometry degradation (material wear out at critical regions) and material degradation (fatigue and corrosion) were studied to estimate their effects on fatigue lives. Two design innovations were proposed to enhance safety and fatigue life of the five-piece wheel. The threaded-connection design reduced the possibility of failure due to the mismatched wheel components. The BS band pull-out simulation revealed that the threaded-connection design was twice as strong as the conventional five-piece design in holding wheel components and the tire together, and the wheel may fail in a safer mode. The fatigue lives of the rim base were two orders of magnitude higher than those of the conventional five-piece wheel. The two-piece wheel design completely removed the possibility of wheel failure due to mismatched wheel components; the fatigue lives were increased by over two orders of magnitude, compared to the conventional five-piece wheel.
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Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle