SYMPOSIA PAPER Published: 01 January 1977
STP27397S

Measurement of Fast Crack Growth in Metals and Nonmetals

Source

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 Vdynamic = 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