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Fatigue Strength of Three Dimensional Welded Joints: A Synthesis Based on the Strain Energy Density over a Control Volume

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Abstract:

A recent approach based on the local strain energy density (SED) averaged over a given control volume is applied to well documented experimental data taken from the literature, all related to steel welded joints of complex geometry. This small size volume embraces the weld root or the weld toe, both regions modelled as sharp (zero notch radius) V-notches with different opening angles. The SED is evaluated from three-dimensional finite element models by using a circular sector with a radius equal to 0.28 mm. The data expressed in terms of the local energy fall in a scatter band recently reported in the literature, based on about 650 experimental data related to fillet welded joints made of structural steel with failures occurring at the weld toe or at the weld root.

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Periodical:

Key Engineering Materials (Volumes 348-349)

Pages:

413-416

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.348-349.413

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Online since:

September 2007

Authors:

M. Zappalorto, Filippo Berto, Paolo Lazzarin

Keywords:

Fatigue Strength, Notch Stress Intensity Factor, Strain Energy Density, Weld Joint

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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