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Fatigue crack growth analysis of welded aluminium RHS T‐joints with manipulated residual stress level
Author(s) -
MANN T.,
TVEITEN B. W.,
HÄRKEGÅRD G.
Publication year - 2006
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/j.1460-2695.2006.00970.x
Subject(s) - residual stress , welding , materials science , structural engineering , aluminium , joint (building) , stress (linguistics) , finite element method , paris' law , stress concentration , composite material , fracture mechanics , crack closure , engineering , linguistics , philosophy
The fatigue life of a welded aluminium T‐joint made from beams with rectangular hollow section (RHS) has been predicted using a crack propagation analysis and compared with experimental results from joints with different residual stress levels. To include the effect of the residual stresses, the stress ratio was calculated at the weld toe and, via Walker's equation, introduced into the analysis. How to obtain the Walker exponent has been discussed in detail. The introduction of a stress ratio at the weld toe provides good agreement between the experimentally and analytically found S–N curves. The effect of the residual stress was successfully included in the analysis.