SYMPOSIA PAPER Published: 01 January 1984
STP32580S

On the Use of Compliance for Determining Crack Length in the Inelastic Range

Source

Compliance measurements were made during creep and fatigue crack growth to establish crack length. During various tests some of the data from several nickel-base superalloys demonstrated a lack of a one-to-one correspondence between crack length and compliance. In particular, decreases in compliance were observed when going from fatigue to creep and when going from low frequency to higher frequency fatigue cycling. On the other hand, no anomalous behavior was observed in ductile copper when loaded to high K values and subsequently unloaded. It is concluded that a probable cause of the anomalous compliance values during transient loading conditions is due to a complex three-dimensional stress state which may be additionally influenced by environmental factors.

Author Information

Nicholas, T
AFWAL Materials Laboratory, (MLLN) Wright-Patterson Air Force Base, Ohio
Ashbaugh, NE
University of Dayton Research Institute, Dayton, Ohio
Weerasooriya, T
University of Dayton Research Institute, Dayton, Ohio
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: E08
Pages: 682–698
DOI: 10.1520/STP32580S
ISBN-EB: 978-0-8031-4900-7
ISBN-13: 978-0-8031-0208-8