Measurement of Fast Crack Growth in Metals and Nonmetals

J Congleton; BK Denton

doi:10.1520/STP27397S

SYMPOSIA PAPER Published: 01 January 1977

STP27397S

Measurement of Fast Crack Growth in Metals and Nonmetals

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The use of a surface deposited resistance grid technique for crack velocity measurements and the extension of its general applicability to brittle solids by the incorporation of a circular time base for single shot, open shutter oscilloscope recording is described. For metal specimens a more direct crack velocity measurement procedure was used, and it was found that the dynamic potential drop across the faces of the propagating crack obeyed an equation of the form V_dynamic = A·v·c, where v is the crack velocity, c the crack length, and A an empirical constant. Crack velocity profiles for three-point-bend tests on polymethylethacrylate and a variously tempered tool steel are presented.

Author Information

Congleton, J

University of Newcastle upon Tyne, Newcastle upon Tyne, England

Denton, BK

University of Newcastle upon Tyne, Newcastle upon Tyne, England

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Details

Developed by Committee: E08

Pages: 336–358

DOI: 10.1520/STP27397S

ISBN-EB: 978-0-8031-4700-3

ISBN-13: 978-0-8031-0341-2

Measurement of Fast Crack Growth in Metals and Nonmetals

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