Low-cycle fatigue analysis of a web frame corner in ship structures

Fricke, Wolfgang; Friedrich, Nils; Musumeci, Luciano; Paetzold, Hans

doi:10.1007/s40194-014-0117-z

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…The examined specimens were made of mild steel S235JR, which is regularly used in shipbuilding, and welded through the MAG process, employing a 1.2 mm thick wire in accordance with DIN ISO 14341-A-G4Si1 regulations. Small-scale samples were built to replicate the realistic loading and boundary conditions of the large-scale model [45] observed in real service scenarios and realized at the Hamburg University of Technology. Figure 1b reports the small-scale specimen, showing a detail of the circle portion of Figure 1a that was obtained by welding a lower plate to a continuous upper plate, as illustrated in Figure 1a.…”

Section: Low-cycle Fatigue Testsmentioning

confidence: 99%

Digital Image Correlation Structural Strain Analysis of S235 Fillet-Welded Joints under Low-Cycle Fatigue Loadings

Corigliano,

Dong

2024

JMSE

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The main objectives of the present study were the application and validation of the newly proposed Digital Image Correlation equivalent structural strain approach for assessing the low-cycle fatigue life of S235 welded joints. Low-cycle fatigue tests were performed at a displacement ratio of minus one. Experimental tests were performed using two different ways of controlling the displacement amplitude: applying traditional low-cycle fatigue tests at a constant amplitude and stepwise succession tests at increasing amplitudes. A comprehensive, independent experimental procedure, proposed by the authors and not yet validated for steel welded joints, was applied to assess the equivalent structural strain range using the Digital Image Correlation technique for the traditional low-cycle fatigue tests and stepwise succession tests at increasing amplitudes. It is noteworthy that the values of the DIC equivalent structural strain (ΔEs from the DIC), calculated on the external sides of the samples, were utilized to predict fatigue life in correlation with the ASME mean curve and fall within the ±3σ scatter bands (external bands). In particular, most of the tests lie within the ±2σ boundary of the design curves except for some tests at low applied displacements. Moreover, it was shown that this method is applicable to stepwise succession tests with increasing displacement amplitudes, leading to significant time savings compared to conventional experimental tests.

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Section: Low-cycle Fatigue Testsmentioning

confidence: 99%

Digital Image Correlation Structural Strain Analysis of S235 Fillet-Welded Joints under Low-Cycle Fatigue Loadings

Corigliano,

Dong

2024

JMSE

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“…The effective notch strain ENSN method was positively used to detect the fatigue crack initiation of load-carrying cruciform joints [94]. Fricke et al [95] analyzed the LCF strength of welded joints in ship structures, proving the effectiveness of the ENSN approach.…”

Section: Local Approachesmentioning

confidence: 99%

Review of Fatigue Assessment Approaches for Welded Marine Joints and Structures

Corigliano

Crupi²

2022

Metals

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Welded joints are widely used in many sectors and represent the main joining technique also in the marine industry. The welded joints are sites of high stress concentrations and are subject to severe conditions for the marine environment. The design of marine welded joints has to consider the effects from wave loads, ship motions and loading/unloading operations and corrosion effects. The aim of this scientific work is to discuss about the state of the art of the standards and the approaches for predicting the fatigue life of welded joints used for the marine industry. Several approaches are examined in order to provide an overview and highlight the advantages and limitations of each method. Furthermore, recent advances in welding of dissimilar metals and autonomous welding are considered.

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“…Other studies [8][13] [20][21] also choose the initial dimensions of crack based on current codes in a conservative way when they are lacking available data of crack properties. It is also recommended to use actual crack data detected by available devices [9] as Wolfgang Fricke [22] and G. Terán [23] perform physical fatigue test on welded steel structures.…”

Section: Define Crack Propertiesmentioning

confidence: 99%

Fatigue Assessment of Crack Growth Based on Failure Assessment Diagrams for a Semi-Submersible Platform

Zhao¹,

Chen²,

Fan³

2019

brod

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This paper deals with the assessment of fatigue crack propagation on the connection between column and brace for a semi-submersible. The analysis of global and local structural responses under different sea states are performed to acquire the transfer functions of stresses. Based on an existing crack the Failure Assessment Diagrams (FAD) are applied as criterion of acceptance for the safety of crack and structure during the crack growth calculation cycle. The crack growth rate considering threshold stress intensity factor and stress ratio is used. During safety assessment the stress response from ultimate sea state is outlined. A comparison of fatigue crack growth using ultimate stress and normal stress data with different crack growth rate is presented. The results show the reliability of fatigue assessment using FAD as a measurement of acceptability of crack propagation.

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Low-cycle fatigue analysis of a web frame corner in ship structures

Cited by 8 publications

References 6 publications

Digital Image Correlation Structural Strain Analysis of S235 Fillet-Welded Joints under Low-Cycle Fatigue Loadings

Digital Image Correlation Structural Strain Analysis of S235 Fillet-Welded Joints under Low-Cycle Fatigue Loadings

Review of Fatigue Assessment Approaches for Welded Marine Joints and Structures

Fatigue Assessment of Crack Growth Based on Failure Assessment Diagrams for a Semi-Submersible Platform

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