Fatigue crack growth and closure behavior under random loadings in 7475-T7351 aluminum alloy

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Fatigue crack growth and closure behavior under random loadings in 7475-17351 aluminum alloy is investigated by performing various random loading tests. The effects of random load spectrum, history length, and stress ratio on the crack growth and closure behavior are discussed. The crack opening load was automatically determined by using the normalized-extended ASTM method. The crack opening load is nearly constant during a random loading block and is mainly governed by the largest load cycle in a random load history, irrespective of random load spectrum and history length. The fatigue crack growth under random loading can be well described by the crack closure concept. (C) 2012 Elsevier Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2013-02
Language
English
Article Type
Article
Keywords

STRIP-YIELD MODEL; VARIABLE-AMPLITUDE; CONSTANT

Citation

INTERNATIONAL JOURNAL OF FATIGUE, v.47, pp.196 - 204

ISSN
0142-1123
DOI
10.1016/j.ijfatigue.2012.09.001
URI
http://hdl.handle.net/10203/93614
Appears in Collection
ME-Journal Papers(저널논문)
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