Service life indicator for highly stressed light-weight structures
US6578430B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 2000 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Apr 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0664
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a service life indicator for monitoring structures, such as pioneering bridges, which are designed with a limited fatigue strength and whose service life is therefore limited. A service life indicator for monitoring structures, such as pioneering bridges designed with a limited fatigue strength and consequently limited service life, is provided. The service life indicator includes a strip of material as a test piece, having at least one hole arranged off-center in the test piece and a notch extending from an edge of the hole in a direction of an edge of the test piece for determining material fatigue. The notch extends to a nearest edge of the test piece and includes two mutually opposite grooves having the same cross-sectional shape that can be one of round, elliptical, oval, v-shaped and trapezoidal in cross-section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.