Location

San Diego, CA

Start Date

1-1-1985 12:00 AM

Description

Theoretical consideration of ultrasonic scattering from interior cracks has received considerable attention in recent years. These studies have led to scattering amplitude computations for ultrasonic backscatter from circular cracks by the method of optimal truncation (MOOT) (1, 2) and by T-matrix techniques (3). A key observation in these results is that a peak in the magnitude of the scattering amplitude is found to occur at approximately ka = 1, where k is the longitudinal wave number and a the crack radius, which is independent of the scattering direction. Up to the present, however, adequate experimental verification of these findings have been impossible due to a lack of suitable laboratory samples.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

4A

Chapter

Chapter 3: Theoretical and Applied Inverse Methods

Section

Ultrasonic Applications

Pages

603-609

DOI

10.1007/978-1-4615-9421-5_67

Language

en

File Format

Application/pdf

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Jan 1st, 12:00 AM

Resonant Scattering and Crack Sizing

San Diego, CA

Theoretical consideration of ultrasonic scattering from interior cracks has received considerable attention in recent years. These studies have led to scattering amplitude computations for ultrasonic backscatter from circular cracks by the method of optimal truncation (MOOT) (1, 2) and by T-matrix techniques (3). A key observation in these results is that a peak in the magnitude of the scattering amplitude is found to occur at approximately ka = 1, where k is the longitudinal wave number and a the crack radius, which is independent of the scattering direction. Up to the present, however, adequate experimental verification of these findings have been impossible due to a lack of suitable laboratory samples.