Characteristics of a Run-Arrest Segment of Crack Extension

PB Crosley; EJ Ripling

doi:10.1520/STP27389S

SYMPOSIA PAPER Published: 01 January 1977

STP27389S

Characteristics of a Run-Arrest Segment of Crack Extension

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During a run-arrest segment of crack extension, the crack attains a high velocity shortly after initiating, and then decelerates in a continuous fashion to arrest.

Strain measurements made during the event show that over the early portion of the jump when the crack velocity is high, the specimen behavior requires a dynamic analysis. During the later portions of the jump, when the velocity is low, the specimen behavior is described adequately by an analysis that assumes a condition of static equilibrium. Hence, if the dependence of a on K for the test material is described by a gamma (Γ) shaped curve, the crack arrest toughness, K_Ia, is an adequate description of K_Im, the minimum toughness for stable crack extension.

Author Information

Crosley, PB

Materials Research Laboratory, Inc., Glenwood, Ill.

Ripling, EJ

Materials Research Laboratory, Inc., Glenwood, Ill.

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Details

Developed by Committee: E08

Pages: 203–227

DOI: 10.1520/STP27389S

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

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

Characteristics of a Run-Arrest Segment of Crack Extension

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