Development and Characterization of a Novel Hybrid Magnetorheological Elastomer
Notice bibliographique
Résumé
Over the past few decades, functional magnetorheological (MR) materials have been extensively researched due to their field-dependent adaptive mechanical properties, which hold substantial promise for implementing semi-active vibration control across various engineering applications. MR elastomers (MRE) are the solid analogue of well-known MR fluids (MRF), where micron-sized ferromagnetic particles are integrated within an elastomeric medium rather than a carrier fluid. In contrast to MRFs, which provide field-dependent variable damping properties, MREs exhibit adjustable stiffness and damping characteristics. MREs also do not experience the sedimentation of magnetic particles and leakage often encountered in MRF-based systems. While there are several studies related to the characterization of MREs operating in shear mode under varying mechanical and magnetic excitation conditions, there are very few studies on the characterization of MREs under compression mode. In particular, the characterization of hybrid MREs, in which MRF is encapsulated within MREs, has been rarely investigated. The objective of the present research is to systematically characterize and compare the viscoelastic properties and dynamic behavior of MREs, MRF-Es (where MR fluid is encapsulated within an elastomeric matrix), and new hybrid MRF-MREs (where MR fluid is encapsulated within MREs), considering the effects of design factors (i.e., shape factor and shape) and mechanical and magnetic loading conditions. To accomplish this, eight different samples of MREs, MRF-Es, and MRF-MREs were fabricated. Dynamic characterization was performed in compression mode under harmonic excitations with varying strain amplitude, frequency, and applied current, ranging from (2.5% to 15%), (0.088 Hz to 10 Hz), and (0 A to 8 A), respectively. Results suggested superior performance of MRF-MREs, exhibiting a relative MR effect of nearly 478%, almost three times that of its counterpart, the MRF-E, and surpassing the MRE by a factor of ten under identical loading conditions. Finally, a phenomenological model was developed based on the modified viscoelastic Kelvin-Voigt model to predict the viscoelastic storage and loss moduli of MREs, MRF-Es, and MRF-MREs as functions of frequency, strain amplitude, and current. The developed model was subsequently used to derive the transmissibility response of an adaptive single-degree-of-freedom (SDOF) system to investigate its capability to tune the natural frequency. An experimental test setup was also designed to confirm the variation in natural frequency of the SDOF system under varying current.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
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 | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 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 | 0,001 |
| 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 découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».