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Fatigue damage identification by means of modal parameters

✍ Scribed by F. Curà; A.E. Gallinatti

Publisher
Elsevier
Year
2011
Tongue
English
Weight
269 KB
Volume
10
Category
Article
ISSN
1877-7058

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✦ Synopsis

Object of the present paper is an experimental investigation about high cycles fatigue damage and corresponding variation of modal parameters (internal damping and resonance frequency) in steel specimens. On the basis of a modal approach, a mixed technique has been developed in order to relate fatigue damage and intrinsic properties of the material. The experimental procedure consists of the modal parameters assessment on steel specimens, once before fatigue test beginning, and thus repeated after every 10 5 cycles, both with constant and increasing loading levels. Infrared thermography has been used to emphasize the specimen thermal emission and the related damage phenomena.

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