Abstract
A new ultrasonic evaluation method has been developed for the determination of crack opening stress intensity factor of small fatigue cracks under no load condition. The crack depth and the closure stress of an unknown closed crack are determined simultaneously from the measured shear wave response by solving an inverse problem, where a new modeling of the crack closure is used. From the evaluated crack depth and the crack closure stress, the crack opening stress intensity factor is determined. The method developed is proved to be a powerful tool for reliable nondestructive evaluation of small closed cracks under a no load condition.
| Original language | English |
|---|---|
| Pages (from-to) | 1277-1284 |
| Number of pages | 8 |
| Journal | Key Engineering Materials |
| Volume | 270-273 |
| Issue number | II |
| Publication status | Published - 2004 Jan 1 |
| Event | Proceedings of the 11th Asian Pacific Conference on Nondestructive Testing - Jeju Island, Korea, Republic of Duration: 2003 Nov 3 → 2003 Nov 7 |
Keywords
- Inverse Analysis
- Small Closed Crack
- Stress Intensity Factor
- Ultrasonic NDE
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering