In this paper a finite element-based computational method is proposed in order to estimate the fatigue life of fillet-welded joints in structural steel by means of a procedure applicable in an industrial context. The computational method enables one to estimate the intensity of the singular stress field close to the weld toe, where cracks are supposed to initiate, by means of the fictitious elastic peak stress evaluated at the point of singularity. A special two-step analysis procedure is defined for joints having a complex geometry. Finally a previously defined unified scatter band in terms of fictitious elastic peak stress is now applied to welded joints having a complex three dimensional geometry. Theoretical estimations are then compared with experimental results taken from literature.
A computational method for fatigue life estimation of steel fillet-welded joints
ATZORI, BRUNO;MENEGHETTI, GIOVANNI;
2005
Abstract
In this paper a finite element-based computational method is proposed in order to estimate the fatigue life of fillet-welded joints in structural steel by means of a procedure applicable in an industrial context. The computational method enables one to estimate the intensity of the singular stress field close to the weld toe, where cracks are supposed to initiate, by means of the fictitious elastic peak stress evaluated at the point of singularity. A special two-step analysis procedure is defined for joints having a complex geometry. Finally a previously defined unified scatter band in terms of fictitious elastic peak stress is now applied to welded joints having a complex three dimensional geometry. Theoretical estimations are then compared with experimental results taken from literature.
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