Location

Thousand Oaks, CA

Start Date

1975 12:00 AM

Description

The ultrasonic detection of cracks in the interior of an elastic solid by the use of surface transducers is a fundamental NDE problem. The presence of cracks may be detected either by observing the back scattered elastic waves using the launching transducer as a receiver or by observing obliquely scattered waves with a separate receiving transducer located elsewhere on the surface. Unfortunately, most of the theoretical work on the scattering of elastic waves from cracks has been confined to the case of a crack in an unbounded elastic solid, a situation far different from the experimental one. Even in that case, exact results are available only for the crack occupying a half plane. Exact results for cracks having finite surface area, such as a penny shaped cracks, are not available in detail, although many approximate calculations have been published, particularly in the low frequency limit.

Book Title

Proceedings of the ARPA/AFML Review of Quantitative NDE

Chapter

4. Ultrasonic Scattering 2

Pages

247-271

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Review of Theories of Scattering of Elastic Waves by Cracks

Thousand Oaks, CA

The ultrasonic detection of cracks in the interior of an elastic solid by the use of surface transducers is a fundamental NDE problem. The presence of cracks may be detected either by observing the back scattered elastic waves using the launching transducer as a receiver or by observing obliquely scattered waves with a separate receiving transducer located elsewhere on the surface. Unfortunately, most of the theoretical work on the scattering of elastic waves from cracks has been confined to the case of a crack in an unbounded elastic solid, a situation far different from the experimental one. Even in that case, exact results are available only for the crack occupying a half plane. Exact results for cracks having finite surface area, such as a penny shaped cracks, are not available in detail, although many approximate calculations have been published, particularly in the low frequency limit.