Journal Published Online: 01 September 1999
Volume 27, Issue 5

Comparison of Finite Element Results and Experimental Measurements of CTOD δ in CT Specimens

CODEN: JTEVAB

Abstract

Elastic-plastic finite element modeling of the CTOD δ5 measuring procedure is performed for CT specimens made from 22NiMoCr37 containing fatigue precracks with curved crack fronts. It is shown that a discrete model with curved crack front and actual position of the clip gage provides reasonable accuracy of results. An approximate model with straight crack front of average crack depth and actual location of the clip gage can also be used. It is proposed to adjust experimental δ5 values for the deviation of actual crack front curvature a from a specific value. The use of the adjustment procedure decreases the scatter of experimental values of CTOD δ5 considerably.

Author Information

Nikishkov, GP
Institute of Materials Research, GKSS Research Center, Geesthacht, Germany
Heerens, J
Institute of Materials Research, GKSS Research Center, Geesthacht, Germany
Hellmann, D
Institute of Materials Research, GKSS Research Center, Geesthacht, Germany
Pages: 5
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: JTE12230J
ISSN: 0090-3973
DOI: 10.1520/JTE12230J