Method of measuring factor of stress concentration by utilizing ultrasound
US4694698A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1986 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Apr 22, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02872
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a method of measuring, by utilizing ultrasound, the factor of stress concentration at a stress-concentrated portion of a member, comprising the steps of emitting ultrasound for incidence upon the stress-concentrated portion of the member in stressed state, increasing the stress in said stressed state, comparing the acoustic pressure of the reflected wave from said stress-concentrated portion between before and after the stress is changed, for thereby measuring the factor of stress concentration and by which the factor of stress concentration of a member composing a machine or the like in a static or dynamic state can be measured easily, real-time, quantitatively, nondestructively and highly accurately.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.