Estensione del metodo della tensione di picco per la progettazione a fatica di strutture saldate mediante modelli a elementi finiti shell

Alberto Visentin; Alberto Campagnolo; Vittorio Babini; Giovanni Meneghetti

doi:10.71439/19uf6y50

Authors

Alberto Visentin Department of Industrial Engineering, University of Padova Author
Prof. Alberto Campagnolo Department of Industrial Engineering, University of Padova Author
Eng. Vittorio Babini Antonio Zamperla S.p.A. Author
Prof. Giovanni Meneghetti Department of Industrial Engineering, University of Padova Author

DOI:

https://doi.org/10.71439/19uf6y50

Keywords:

Welded joints, Fatigue design, Peak Stress Method, Shell FE models

Abstract

The Peak Stress Method (PSM) is an engineering local approach to rapidly estimate the fatigue lifetime of welded structures made of structural steel or aluminium alloys and subjected to constant as well as variable amplitude loadings by leveraging solid finite element models and appropriate PSM-based fatigue design curves, which have been validated over more than 2000 experimental fatigue data. In this work, a numerical procedure is proposed to extend PSM applicability by combining a global model of the full structure meshed with shell finite elements with local sub-models of critical regions meshed with solid elements. A case study taken from the literature is reported, concerning the fatigue strength assessment of full-penetration welds between Circular Hollow Section (CHS) braces and Square Hollow Section (SHS) chords made of structural steel and subjected to axial loading. The PSM results obtained through the shell-to-solid sub-modelling approach were compare with those derived from global solid models to prove the effectiveness of the proposed approach in providing an accurate fatigue assessment while reducing the computational effort.

Author Biographies

Alberto Visentin, Department of Industrial Engineering, University of Padova

Research Associate at the Department of Industrial Engineering of the University of Padova
Prof. Alberto Campagnolo, Department of Industrial Engineering, University of Padova

Associate Professor at the Department of Industrial Engineering of the University of Padova
Eng. Vittorio Babini, Antonio Zamperla S.p.A.

-
Prof. Giovanni Meneghetti, Department of Industrial Engineering, University of Padova

Full Professor in Machine Design at the Department of Industrial Engineering of the University of Padova

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