Original scientific paper

https://doi.org/10.17559/TV-20200414015501

Initial Fatigue Life Estimation of Welded Structural Components

Mirko Maksimovic ; PUC Belgrade Waterworks and Sewerage, Kneza Milosa st. 27, Belgrade, Serbia
Katarina Maksimovic ; City of Belgrade Administration, Kraljice Marije st. 1, Belgrade, Serbia
Dragi Stamenkovic ; IDS GmbH, Oberhausen, Germany
Ivana Vasovic Maksimovic* ; Lola Institute, Kneza Višeslava st. 70a, Belgrade, Serbia

Abstract

Numerical modelling of welding process of two cylindrical tubes subjected to cyclic loads of constant amplitude is presented. For that purpose the Finite Element Method (FEM) was used for determination of thermo-mechanical behaviour and evaluation of welded joint residual stresses. In this investigation an efficient computation method for initial fatigue life estimation of welded structural components has been developed. Computation method with corresponding computation procedure is based on finite element numerical simulations of the thermal and stress analyses. As measure of fatigue resistance of welded structural elements, estimated values of low cycle fatigue life were used. Estimation of damages up to crack initiation in the welded joints of two cylindrical tubes was performed using SWT (Smith-Watson-Topper) relations. Present computation results are compared with corresponding experimental results of welded structural components. Obtained computation results of initial fatigue life estimation of welded structural element are in good agreement with experimental results.

Keywords

cylindrical tube; fatigue life estimation; finite elements; numerical simulations; welded structures

Hrčak ID:

260739

URI

https://hrcak.srce.hr/260739

Publication date:

22.7.2021.

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