SYMPOSIA PAPER Published: 01 January 1988
STP23219S

A Critical Comparison of Proposed Parameters for High-Strain Fatigue Crack Growth

Source

A number of elastic-plastic fracture mechanics parameters have been suggested for the description of fatigue crack growth, of which three are considered in this paper: the J-integral, crack-tip opening displacement, and plastic zone size. A critical comparison of the effectiveness of each parameter may be devised from a study of Mode I fatigue crack growth rates under various states of biaxial stress. Data for one heat of AISI 316 austenitic stainless steel at 20°C and 550°C showed that, if crack closure is taken into account, the cyclic plastic zone size is the most suitable correlating parameter for stress levels up to the yield value. A second heat of 316 stainless steel showed a preference for crack opening displacement control of crack growth. The analysis is based on the Dugdale model for crack-tip plasticity.

Author Information

Brown, MW
University of Sheffield, Sheffield, United Kingdom
de los Rios, ER
University of Sheffield, Sheffield, United Kingdom
Miller, KJ
University of Sheffield, Sheffield, United Kingdom
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Details
Developed by Committee: E08
Pages: 233–259
DOI: 10.1520/STP23219S
ISBN-EB: 978-0-8031-5034-8
ISBN-13: 978-0-8031-0925-4