Multidirectional fatigue damage indicator
US6443018B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Jun 5, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multidirectional fatigue damage indicator is disclosed. The fatigue damage indicator is composed of a series of fatigue fuse elements welded to a semicircular assembly frames. The fuse elements have the same fatigue lifetime in each row but have different lifetime from row to row so that it may enable one to monitor the progress of fatigue damage of the structure. A series of fatigue fuse elements are welded to a semicircular assembly frame in circumferential direction and additionally in radial direction. The arrangement in circumferential direction is to cover the changing characteristics of the principal stress directions while that in radial direction is to monitor the actual progress of fatigue damage under combined cyclic loads by watching the sequential fracture of the fuse elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.