Fatigue crack propagation in stiffened panels under tension loading

Božić, Željko and Parunov, Joško and Fadljevic, Marko (2010) Fatigue crack propagation in stiffened panels under tension loading. = Fatigue crack propagation in stiffened panels under tension loading. In: International Workshop "Advanced Ship Design for Pollution Prevention", ASDEPP 2010, 23-24.11.2009., Split; Croatia.

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Abstract

Fatigue crack growth in stiffened panels under cyclic tension loading was studied in this paper. Results of fatigue crack propagation tests with cyclic stress of constant amplitude and frequency on centrally notched plate and stiffened panel specimens were reported. A numerical crack growth simulation procedure based on integration of Paris equation was introduced and fatigue lifetime was simulated for the specimens. Implementing the introduced procedure crack propagation in a main deck longitudinal of a double-hull oil tanker was analyzed. The Mode I, IIand IIIStress Intensity Factors (SIFs) were determined in a FEA using singular elements. Compared to Mode ISIFvalues, the Mode IIand IIIvalues were small and did not influence structural components fatigue lifetime significantly. Secondary bending which occurs due to the cut stiffeners or flanges has been taken into account in the stress intensity factor determination. The study showed a significant influence of secondary bending on crack growth rate in stiffened panels. Also, it was shown that an increase in nominal loading stress range of 10 or decrease of 5, can shorten or extend fatigue lifetime of the structural component by 30 or 20, respectively. © 2010 Taylor & Francis Group, London.

Item Type:	Conference or Workshop Item (Lecture)
Keywords (Croatian):	Constant amplitude; Crack growth simulation; Cyclic stress; Cyclic tension; Fatigue cracks; Fatigue lifetime; Intensity factors; Paris equations; Secondary bending; Singular elements; Stiffened panel; Stress range; Structural component; Tension loading; Design; Fatigue crack propagation; Oil tankers; Pollution; Shipbuilding; Stress analysis; Stress intensity factors; Structural panels; Loading
Subjects:	TECHNICAL SCIENCE > Shipbuilding TECHNICAL SCIENCE > Mechanical Engineering
Divisions:	1300 Department of Aeronautical Engineering > 1310 Chair of Aerodynamics 600 Department of Naval Engineering and Marine Technology > 620 Chair of Marine Structures Design
Indexed in Web of Science:	No
Indexed in Current Contents:	No
Citations SCOPUS:	1 (04.10.2017.)
Date Deposited:	15 Apr 2015 12:36
Last Modified:	04 Oct 2017 07:49
URI:	http://repozitorij.fsb.hr/id/eprint/3625

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