期刊
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
卷 39, 期 3, 页码 372-383出版社
WILEY-BLACKWELL
DOI: 10.1111/ffe.12369
关键词
critical plane method; fatigue; multiaxial load; structural stress; welded joint
资金
- National Science Foundation for Excellent Young Scholars [51222502]
- National Science Foundation of China [11402297]
- Fund for Distinguished Young Scientists of Hunan Province [14JJ1016]
- National Excellent Doctoral Dissertation Special Fund [201235]
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.
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