The Influence of Residual Stresses on Fatigue Crack Growth Rate in Stiffened Panels

Božić, Željko and Schmauder, Siegfried and Wolf, Hinko (2013) The Influence of Residual Stresses on Fatigue Crack Growth Rate in Stiffened Panels. = The Influence of Residual Stresses on Fatigue Crack Growth Rate in Stiffened Panels. In: 2nd Mediterranean Conference & New Challenges on Heat Treatment and Surface Engineering, 11-14. 06. 2013., Dubrovnik-Cavtat, Croatia.

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Official URL: http://bib.irb.hr/prikazi-rad?rad=647725

Abstract

This paper presents models for predicting fatigue crack propagation in welded stiffened panels. The Mode I total stress intensity factor Ktot values with respect to crack length were determined based on the superposition rule of linear elastic fracture mechanics by using finite element method. The FEM models included idealized residual stress distribution patterns. By using the Paris power law equation the crack propagation life was simulated for a welded stiffened panel specimen and compared with results of cyclic tension fatigue tests. Numerical simulations demonstrated that tensile welding residual stresses in the vicinity of stiffeners increase the Ktot values and the crack growth rate. Compressive residual stresses between the stiffeners reduce the fatigue crack growth rate. This was in good agreement with experimental results. The results emphasized the significance of residual stresses in the assessment of the fatigue crack growth life in welded stiffened panels.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Modeling, Fatigue, Crack propagation, Residual stress
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 1300 Department of Aeronautical Engineering > 1310 Chair of Aerodynamics
200 Department of Engineering Mechanics > 230 Chair of Mechanical Systems Dynamics
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 25 Apr 2016 08:12
Last Modified: 16 Dec 2016 13:07
URI: http://repozitorij.fsb.hr/id/eprint/5769

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