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On the feasibility of quantitative ultrasonic determination of fracture toughness: A literature reviewThe three main topics covered are: (1) fracture toughness and microstructure, (2) quantitative ultrasonic and microstructure; and (3) scattering and related mathematical methods. Literature in these areas is reviewed to give insight to the search of a theoretical foundation for quantitative ultrasonic measurement of fracture toughness. The literature review shows that fracture toughness is inherently related to the microstructure and in particular, it depends upon the spacing of inclusions or second particles and the aspect ratio of second phase particles. There are indications that ultrasonic velocity attenuation measurements can be used to determine fracture toughness. The leads to a review of the mathematical models available in solving boundary value problems related to microstructural factors that govern facture toughness and wave motion. A framework towards the theoretical study for the quantitative determination of fracture toughness is described and suggestions for future research are proposed.
Document ID
19810005825
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Fu, L. S. (Ohio State Univ. Columbus, OH, United States)
Date Acquired
September 4, 2013
Publication Date
November 1, 1980
Subject Category
Quality Assurance And Reliability
Report/Patent Number
NASA-CR-3356
E-547
Accession Number
81N14337
Funding Number(s)
CONTRACT_GRANT: NSG-3269
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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