Proposal of modified (normalized) ASTM offset method for determination of fatigue crack opening load

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For determination of crack opening load, a modified ASTM compliance offset method called the normalized ASTM offset method is proposed. which utilizes the relative compliance offset normalized by the maximum offset obtained by the ASTM offset method. The normalized ASTM offset method is evaluated in a quantitative manner for the conventional DeltaK(eff) estimation and also for the 2/pi(2/PI) DeltaK(eff) estimation method proposed by Paris et at. The normalized ASTM offset method improves remarkably correlation of crack growth rate stress ratio effects. in comparison with the ASTM offset method. Quantitative evaluation results indicate that the normalized ASTM offset method is very promising as a precise, simple and practical K-op determination method alternative to the ASTM method, and also the use of the 2/PI (DeltaK(eff)) estimation method is recommended. (C) 2004 Elsevier Ltd. All rights reserved.
Publisher
Elsevier Sci Ltd
Issue Date
2005
Language
English
Article Type
Article
Keywords

GROWTH; BEHAVIOR; CLOSURE

Citation

INTERNATIONAL JOURNAL OF FATIGUE, v.27, no.3, pp.293 - 303

ISSN
0142-1123
DOI
10.1016/j.ijfatigue.2004.06.014
URI
http://hdl.handle.net/10203/89838
Appears in Collection
ME-Journal Papers(저널논문)
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