Abstract
Relaxation of pressure in interference-fitted filament wound composite rings was experimentally investigated. The ring materials, shapes, and pressures were selected to be representative of typical rings for flywheel energy storage systems, where press-fitting and rotation cause long-term loadings that can lead to time-dependent deformation and stress redistribution. Two initial pressures and three interference-fitted ring pair configurations were used; carbon/epoxy on glass/epoxy, carbon/epoxy on aluminum, and aluminum on glass/epoxy. For the composite-on-composite assemblies a 3-4% pressure drop was observed, and for the assemblies with aluminum a 4-5% pressure drop was observed. Approximately steady-state pressures were realized within 500 hours after assembly of the ring pairs. The steady-state pressure losses are percentage-wise independent of the initial pressures, suggesting that a linear-viscoelastic model may apply to these materials.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1904-1915 |
| Number of pages | 12 |
| Journal | International SAMPE Symposium and Exhibition (Proceedings) |
| Volume | 43 |
| Issue number | 2 |
| State | Published - Jan 1 1998 |
| Event | Proceedings of the 1998 43rd International SAMPE Symposium and Exhibition. Part 2 (of 2) - Anaheim, CA, USA Duration: May 31 1998 → Jun 4 1998 |
All Science Journal Classification (ASJC) codes
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering