Emergence of tangential stiffness through the use of inclined orthotropic material
| Autor: | Tadayoshi Shoyama, Osami Matsushita, Yutaka Wada |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Bearing (mechanical) business.industry Mechanical Engineering Stiffness 02 engineering and technology Structural engineering 021001 nanoscience & nanotechnology Orthotropic material Vibration theory of olfaction law.invention Vibration 020303 mechanical engineering & transports 0203 mechanical engineering Natural rubber law visual_art visual_art.visual_art_medium medicine medicine.symptom Tangential stiffness 0210 nano-technology business |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. 235:4273-4282 |
| ISSN: | 2041-2983 0954-4062 |
| DOI: | 10.1177/0954406220967965 |
| Popis: | A flexible bearing support structure is effective for stabilizing the self-excited vibration of a bearing, such as oil whirl. The stabilization effect is increased if the structure has static tangential stiffness, where the reaction force is perpendicular to the displacement. In this study, it is shown that a support component made of inclined orthotropic material, which exhibits shear–extension coupling, can have tangential stiffness. The circumferential average of the tangential stiffness was found to vanish with a rotationally symmetric configuration of these components because the tangential forces of each component cancel out. However, the tangential force was recovered by allowing separation on the contact surface. A circular formation of an inclined orthotropic sheet that shows an axisymmetric stiffness matrix is proposed. Theoretical and numerical analyses clarified the effects of the friction coefficient, fitting interference, and degree of anisotropy of the material. Zero interference was found to be the best condition to maximize tangential stiffness. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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