Journal Published Online: 01 January 1985
Volume 13, Issue 1

A Method for the Defined Fatigue Precracking of Round Notched Bars

CODEN: JTEVAB

Abstract

This paper is concerned with the method of crack length controlled prefatiguing of notched round tension specimens. Since a direct optical analysis of the crack length in the present specimen is not possible, the change in the specimen stiffness is used to determine the crack depth. For this purpose, the deflection of the specimen is measured by laser technique during prefatiguing under reversed bending stressing. Comparing the measurement data with parameters determined by calculation from the transfer matrix method enables the crack depth to be determined on-line at any time of the prefatiguing process.

Author Information

Eisele, U
Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, Stuttgart 80, Federal Republic of Germany
Roos, E
Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, Stuttgart 80, Federal Republic of Germany
Silcher, H
Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, Stuttgart 80, Federal Republic of Germany
Zimmermann, C
Staatliche Materialprüfungsanstalt (MPA), University of Stuttgart, Stuttgart 80, Federal Republic of Germany
Pages: 3
Price: $25.00
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Stock #: JTE10759J
ISSN: 0090-3973
DOI: 10.1520/JTE10759J