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Fatigue strength CAE system for three‐dimensional welded structures
Author(s) -
TANAKA K,
OKAJIMA H,
KOIBUCHI K
Publication year - 2002
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 - 10.1046/j.1460-2695.2002.00467.x
Subject(s) - welding , fatigue limit , structural engineering , joint (building) , stress (linguistics) , point (geometry) , goodman relation , arc (geometry) , size effect on structural strength , singularity , stress concentration , engineering , materials science , fracture mechanics , mechanical engineering , mathematics , geometry , philosophy , linguistics
Fatigue strength assessment methods are applied to practical arc‐welded structural features that have complex three‐dimensional geometry. Two methods are investigated in the present research. The criterion of the first method is cyclic plastic zone size, which is calculated from stress singularity parameters. The criterion of the second method is hot spot stress. These fatigue strength criteria are proved to be applicable to the fatigue strength assessment of practical arc‐welded structural features. These criteria enable a critical point at which fatigue cracks are most likely to initiate to be specified for each type of welded joint and load. Consequently, the critical point simplifies the classification of various welded joints. Furthermore, a fatigue strength computer‐aided engineering system, which includes functional engines for the evaluation of the fatigue strength of a designed shape, is proposed.