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On the interaction of ultrasound with cracks: Applications to fatigue crack growthPartial contact of two rough fatigue crack surfaces leads to transmission and diffraction of an acoustic signal at those contacts. Recent experimental and theoretical efforts to understand and quantify such contact in greater detail are discussed. The objective is to develop an understanding of the closure phenomenon and its application to the interpretation of fatigue data, in particular the R-ratio, spike overload/underload and threshold effects on crack propagation.
Document ID
19860013500
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Buck, O. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Thompson, R. B. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Rehbein, D. K. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Publication Information
Publication: NASA. Lewis Research Center Analytical Ultrasonics in Materials Research and Testing
Subject Category
Acoustics
Accession Number
86N22971
Funding Number(s)
CONTRACT_GRANT: W-7405-ENG-82
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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