Non-destructive method for determining at least one point of a crack front in a part and an apparatus for the implementation of the method
US4763528A · kind A · utility
7Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Dec 5, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/056
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The device concerns a method for detecting the position of at least one point of the crack front within a part (4) subjected to fatique stresses or to a ductile rupture. An ultrasonic beam is used focused in the plane P of the crack growth; the axis of this beam forms an angle comprised between 50.degree. and 80.degree. with P. The beam is displaced until the echo passes through a maximum, in which case the focusing is situated at the tip of the crack in the plane of displacement. The invention also concerns a device for the implementation of the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.