Fatigue damage mechanisms on the basis of acoustic emission measurements

D. Fang*, A. Berkovits

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Citations (Scopus)

Abstract

Integration of the microcomputer into acoustic emission instrumentation has brought AE monitoring of fatigue tests into the realm of practicality. On-line processing makes available a selection of software tools, enhancing classical techniques for eliminating the background noise which usually blanked out the desired data. Fatigue tests monitored for acoustic emission were carried out at room temperature on Incoloy 901 material specimens, over a stress-ratio range of -1≤R≤.2. Valid AE data were obtained even when the load cycle passed through zero. These included initial plasticity, crack nucleation and propagation phases. The AE data permitted specific identification of the various phenomena occurring on the way to final failure. The AE findings were supported by microscopic examination. Based on the experimental data, a preliminary damage-prediction model was formulated.

Original languageEnglish
Title of host publicationNovel Experimental Techniques in Fracture Mechanics
EditorsDennis A. Siginer, William E. VanArsdale, Cengiz M. Altan, Andreas N. Alexandrou
PublisherPubl by ASME
Pages219-235
Number of pages17
ISBN (Print)0791810399
Publication statusPublished - 1993
Externally publishedYes
EventProceedings of the 1993 ASME Winter Annual Meeting - New Orleans, LA, USA
Duration: 28 Nov 19933 Dec 1993

Publication series

NameAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
Volume176
ISSN (Print)0160-8835

Conference

ConferenceProceedings of the 1993 ASME Winter Annual Meeting
CityNew Orleans, LA, USA
Period28/11/933/12/93

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