Location

La Jolla, CA

Start Date

1981 12:00 AM

Description

Rayleigh surface waves are proposed as a non-destructive method to find the depth of surface cracks. The paper describes how dynamic photoelasticity was used to develop an understanding of the subsurface interactions between R-waves and a narrow slot. A frequency analysis of the transmitted wave confirmed that the slot acts as a low pass filter for the high frequency Fourier components of the input wave. It is then shown that the high frequency cut-off in the spectrum of the transmitted wave from broadband ultrasonic surface pulse can be used to determine the depth of surface slots.

Book Title

Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE

Chapter

14. Ultrasonic Sizing of Surface Cracks

Pages

436-442

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

An Ultrasonic Technique for Sizing Surface Cracks

La Jolla, CA

Rayleigh surface waves are proposed as a non-destructive method to find the depth of surface cracks. The paper describes how dynamic photoelasticity was used to develop an understanding of the subsurface interactions between R-waves and a narrow slot. A frequency analysis of the transmitted wave confirmed that the slot acts as a low pass filter for the high frequency Fourier components of the input wave. It is then shown that the high frequency cut-off in the spectrum of the transmitted wave from broadband ultrasonic surface pulse can be used to determine the depth of surface slots.