Location

La Jolla, CA

Start Date

1981 12:00 AM

Description

This paper describes a method for determining the depth of machined slots simulating cracks by the use of Rayleigh waves. Six slots varying in depth from 0.5 mm to 3.0 mm fabricated in medium carbon steel have been sized using a commercially available 1.5 MHz Rayleigh wave transducer. One measurement using the pulse-echo method is made for determining the depth of the crack. Minima in the deconvolved spectra are shown to correspond to various vibration modes of the crack. A fixed-free bar vibration model yields acceptable results. A correlation study between various time-domain features with slot depth is also included.

Book Title

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

Chapter

14. Ultrasonic Sizing of Surface Cracks

Pages

443-450

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Deconvolution Procedure for Crack Depth Determination Using Rayleigh Waves

La Jolla, CA

This paper describes a method for determining the depth of machined slots simulating cracks by the use of Rayleigh waves. Six slots varying in depth from 0.5 mm to 3.0 mm fabricated in medium carbon steel have been sized using a commercially available 1.5 MHz Rayleigh wave transducer. One measurement using the pulse-echo method is made for determining the depth of the crack. Minima in the deconvolved spectra are shown to correspond to various vibration modes of the crack. A fixed-free bar vibration model yields acceptable results. A correlation study between various time-domain features with slot depth is also included.