Development of a Criterion for the Effect on the J-R Curve of Elastic Unloadings

JA Joyce

doi:10.1520/STP23267S

SYMPOSIA PAPER Published: 01 January 1988

STP23267S

Development of a Criterion for the Effect on the J-R Curve of Elastic Unloadings

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A criterion is proposed which allows estimation of the fraction of cyclic damage which would be expected from a given number of partial or complete unloadings applied during the course of a J-R curve fracture toughness test. The criterion requires both geometry and material inputs, but for the special case of a steel compact specimen, an upper-bound criterion is developed and presented graphically.

Data from a series of compact specimens of a 3% nickel alloy steel are used to verify both the model used and the resulting fractional damage criterion developed.

Author Information

Joyce, JA

U.S. Naval Academy, Annapolis, MD

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Details

Developed by Committee: E08

Pages: 647–662

DOI: 10.1520/STP23267S

ISBN-EB: 978-0-8031-5036-2

ISBN-13: 978-0-8031-0949-0

Development of a Criterion for the Effect on the J-R Curve of Elastic Unloadings

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