Nonlinear Acoustic Measurements Ahead of a Notch During Fatigue (Postprint)

Abstract

This paper presents measurements of relative nonlinear acoustic parameter ( rel), ahead of a notch in Al 7075-T651 dog bone samples, subjected to fatigue. It is compared with crack growth measurements on the same samples. Measurements performed on two samples subjected to identical fatigue conditions that failed at vastly different number of fatigue cycles are described. The rel measurement for both samples as a function of fatigue cycles was fit a Boltzmann curve. The role of changing rel ahead of a notch is explored as a possible approach for remain life evaluation.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2013
Accession Number
ADA612123

Entities

People

  • A. L. Hutson
  • M. P. Blodgett
  • R. D. Mooers
  • R. W. Martin
  • S. Sathish

Organizations

  • Air Force Research Laboratory

Tags

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  • Acoustic Measurement
  • Air Force
  • Air Force Facilities
  • Air Force Research Laboratories
  • Government Procurement
  • Governments
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  • Manufacturing
  • Materials
  • Measurement
  • Military Research
  • Technical Information Centers
  • Test And Evaluation
  • United States
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Readers

  • Acoustics.
  • Computational Fluid Dynamics (CFD)
  • Materials Science (Mechanical Engineering).