- Conference date: 22–25 July 2008
- Location: Chicago (Illinois)
Most UT inspection procedures used for detection of breaking wall notches rely on the corner echo effect, which corresponds to the reflection of an obliquely incident wave on the backwall and on the flaw. The amplitude of this corner echo will vary depending on the angle of the flaw and the backwall, as geometrical effects are mainly responsible of the echo. Mode conversion may also occur which gives rise to additional echoes. In addition to these longitudinal and transverse bulk waves modes, if the incident wave over the flaw or over the backwall is closed to the critical angle, head waves and creeping waves may also be generated and interfere with the flaw. This paper presents some experimental and theoretical studies of these effects taking into account bulk and head waves simulation simultaneously.
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