SYMPOSIA PAPER Published: 01 January 1988
STP33070S

Three-Dimensional Effects Affecting the Precision of Lifetime Predictions

Source

A series of laboratory experiments on smooth and side-grooved compact specimens, as well as plates under tension with surface flaws, has been reevaluated by means of three-dimensional elastic-plastic finite-element analyses. Particular emphasis is laid on the calculation of the local crack-tip loading parameter, J, and of the local constraint factor, q. These parameters are correlated with experimental findings concerning initiation and stable crack propagation. A first-guess correlation between q and the slope of Ja) curves is established.

Author Information

Kordisch, H
Fraunhofer-Institut für Werkstoffmechanik, Freiburg, Federal Republic of Germany
Sommer, E
Fraunhofer-Institut für Werkstoffmechanik, Freiburg, Federal Republic of Germany
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Details
Developed by Committee: E08
Pages: 73–87
DOI: 10.1520/STP33070S
ISBN-EB: 978-0-8031-5041-6
ISBN-13: 978-0-8031-0972-8