Journal
THEORETICAL AND APPLIED FRACTURE MECHANICS
Volume 83, Issue -, Pages 67-72Publisher
ELSEVIER
DOI: 10.1016/j.tafmec.2015.12.019
Keywords
Critical plane-based criterion; Frequency-domain criterion; Multiaxial fatigue; Random loading
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Funding
- Italian Ministry of Education, University and Research (MIUR)
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A frequency-domain High-Cycle Fatigue (HCF) criterion based on the critical plane approach is here proposed to estimate fatigue life of smooth metallic structural components under multiaxial random loading. The procedure consists of the following three steps: (a) definition of the critical plane; (b) PSD evaluation of an equivalent normal stress; and (c) computation of the fatigue life. A new formulation to define the critical plane is adopted in order to improve the lifetime estimation. The criterion is validated through comparison of the obtained numerical results with experimental fatigue data available in the literature for structural steel specimens subjected to a combination of random non-proportional bending and torsion. (C) 2015 Elsevier Ltd. All rights reserved.
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