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Indexed by:期刊论文

Date of Publication:2014-06-01

Journal:INTERNATIONAL JOURNAL OF FATIGUE

Included Journals:SCIE、EI

Volume:63

Page Number:171-182

ISSN No.:0142-1123

Key Words:Structural stress; Multiaxial fatigue; Welded joints; Nonlinearly distributed stress; Stress gradient

Abstract:A new approach to estimate the structural stress for the assessment of the multiaxial fatigue strength of welded joints is proposed. In this approach, the structural stress at a point just below the weld toe in the plate thickness direction is evaluated and adopted for the multiaxial fatigue strength assessment of complex welded joints in combination with the Modified Wohler Curve Method. Numerical results show that the adoption of the thus estimated structural stress, rather than the traditional hot spot stress, produces more accurate fatigue life estimation for structure members experiencing either uniaxial or multiaxial loading. (C) 2014 Elsevier Ltd. All rights reserved.