Location

La Jolla, CA

Start Date

1-1-1998 12:00 AM

Description

Fatigue cracks have been found to initiate and grow in the radial direction in many annulus shaped components in aging helicopters. Detection of such radial cracks using conventional ultrasonic imaging techniques is rather ineffective. Recently, it has been proposed [1] that guided ultrasonic waves that propagate in the circumferential direction may be used for the detection of radial fatigue cracks in weep holes in airframes. Before such guided waves can be used effectively for detecting radial cracks in annulus components, their generation and propagation must be understood. The physics and mechanics of the wave fields must be carefully examined.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

17A

Chapter

Chapter 1: Standard Techniques

Section

Guided Waves and Applications

Pages

153-160

DOI

10.1007/978-1-4615-5339-7_19

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Guided Transient Waves in a Circular Annulus

La Jolla, CA

Fatigue cracks have been found to initiate and grow in the radial direction in many annulus shaped components in aging helicopters. Detection of such radial cracks using conventional ultrasonic imaging techniques is rather ineffective. Recently, it has been proposed [1] that guided ultrasonic waves that propagate in the circumferential direction may be used for the detection of radial fatigue cracks in weep holes in airframes. Before such guided waves can be used effectively for detecting radial cracks in annulus components, their generation and propagation must be understood. The physics and mechanics of the wave fields must be carefully examined.