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A structural stress‐based critical plane method for multiaxial fatigue life estimation in welded joints
Author(s) -
Jiang C.,
Liu Z. C.,
Wang X. G.,
Zhang Z.,
Long X. Y.
Publication year - 2016
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12369
Subject(s) - structural engineering , welding , reliability (semiconductor) , materials science , joint (building) , stress (linguistics) , plane (geometry) , stress concentration , finite element method , engineering , composite material , mathematics , geometry , power (physics) , linguistics , physics , philosophy , quantum mechanics
This paper aims at proposing a new fatigue life estimation model that is preferably adapted to welded joints subjected to multiaxial loading. First, a mesh‐size insensitive structural stress is defined that enables to characterize the stress concentration effect appropriately. Second, the multiaxial stress state and loading path influence are taken into account in the lifetime prediction model by adopting a suitable critical plane method, originally proposed by Carpinteri and co‐authors. Experimental verification is conducted for a given welded joint geometry under different loading conditions, including uniaxial, torsional and multiaxial loads. The reliability and effectiveness of the new method are validated through substantive fatigue testing data.