Local and Non-Local Approaches to Fatigue of Weldments: State of the Art and Possible Developments

Roberto Tovo; Paolo Livieri

doi:10.4028/www.scientific.net/KEM.348-349.529

Paper Titles

The Constitutive Model for Isotropic Damage of Geomaterial
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Interaction of Circular Lining and Interior Linear Crack by Incident SH-Wave
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A Unified Fatigue Life Calculation Model for Notched Components Based on Elastic-Plastic Fracture Mechanics
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Local and Non-Local Approaches to Fatigue of Weldments: State of the Art and Possible Developments
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Numerical Testing for Dynamic Fracture of Three Point Bending Cement Mortar Specimen with Off-Center Edge-Crack
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Improvement of Fatigue Strength of Maraging Steel by Shot Peening
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Fatigue Crack Growth Resistance in Ni-Base Super Alloy
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Temper Embrittlement and Fracture Control Method Based on NGS Theory and Grain Refinement Technique
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Local and Non-Local Approaches to Fatigue of Weldments: State of the Art and Possible Developments

Abstract:

This paper attempts to critically review some numerical methods for fatigue strength assessment of welded joints by means of stress analysis tools (usually FE models). In particular, it focuses on the significance of geometrical model, by distinguishing beams from shells and solids, more than distinguishing among nominal, structural and notch stress type. In addition, basing on continuous mechanics theories, a distinction between “local” and “non-local” stress approaches is proposed. Finally the advantages of notch stress approaches are showed by commenting also problems connected to multiaxiality and three-dimensionality of stress states.

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Periodical:

Key Engineering Materials (Volumes 348-349)

Pages:

529-532

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.348-349.529

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Online since:

September 2007

Authors:

Roberto Tovo, Paolo Livieri

Keywords:

Fatigue Life Assessment, Non-Local Stress, Stress Gradient, Weld Joint

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