Application of the weakest link analysis to the area of fatigue design of steel welded joints

Blacha, Łukasz; Karolczuk, Aleksander; Bański, R.; Stasiuk, Przemysław

doi:10.1016/j.engfailanal.2013.06.012

Cited by 24 publications

(9 citation statements)

References 15 publications

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“…Therefore, in addition to the scale effect [7,9], we also have the number of samples effect [4,33] or the weakest link effect [5][6]. Fatigue tests for a combination of cyclic proportional bending and torsion are most often and easiest described by the Gough-Pollard criterion [18] in the formula…”

Section: Fatigue Life-time Of 6060 Aluminium Alloymentioning

confidence: 99%

Fatigue fracture cross-sections after cyclic tests with a combination of cyclic bending and torsion of samples made of aluminum alloy 6060

Łagoda,

Małecka,

Małys

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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The paper presents the results of fatigue tests of the 6060 aluminum alloy. The test material was taken from the profiles used for production of side windows and external doors of the passenger trains by the RAWAG company. The tests were carried out for cyclic loads with pure bending, pure torsion, and two combinations of bending and torsion. Fatigue tests were performed at zero mean values. Using scanning electron microscopy, a fractographic analysis was made, which is a supplementary basis for considerations about the mechanism of initiation and development of fatigue cracks. Based on the appearance of individual zones and the characteristics of cracks, a picture of the behavior of the material under specific conditions was obtained. Finally, the plastic property of fatigue cracks was indicated. The work demonstrates the influence of aluminum alloy processing on the fatigue properties of this alloy during operation in order to obtain maximum reliability and safety of railway transport.

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Section: Fatigue Life-time Of 6060 Aluminium Alloymentioning

confidence: 99%

Fatigue fracture cross-sections after cyclic tests with a combination of cyclic bending and torsion of samples made of aluminum alloy 6060

Łagoda,

Małecka,

Małys

et al. 2023

Eksploatacja i Niezawodność – Maintenance and Reliability

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“…Until now, several semi-empirical methods based on the fatigue tests have been widely used in the industry. The examples include the widely accepted nominal stress [ 6 , 7 , 8 ], traction-based structural stress [ 9 , 10 ], hot spot stress [ 11 , 12 , 13 , 14 ], peak stress method [ 15 ], and similar assessment methods [ 16 , 17 , 18 ]. The above methods have considerable advantages, that is the accuracy of the experimental data which can be used in various fields and to formulate relevant industry standards [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Life of 7005 Aluminum Alloy Cruciform Joint Considering Welding Residual Stress

Wang

Fang

2021

Materials

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An evaluation method is proposed for determining the full fatigue life of aluminum alloy cruciform joint, including the crack initiation and propagation with welding residual stress. The results of simulations have shown that the boundary between the initiation and propagation stage is not constant, but a variable value. The residual stress leads to a significant reduction in both stages, which is more severe on initiation. With considering residual stress, the ratio of crack initiation to total life is below 7%. The effect of residual stress varies with external loading; when external load is lower, the residual stress has a greater effect.

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“…All structural designs today are based on the weakest link model such that the lowest criterion of a design parameter has to be chosen [22]. This criterion is applied for any other component made of the same material although the fatigue lives for each of those different components will vary as a result of the difference in the materials' parameter scatter.…”

Section: Introductionmentioning

confidence: 99%

SteBLife, a New Approach for the Accelerated Generation of Metallic Materials’ Fatigue Data

Acosta

Venkat

et al. 2020

Metals

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The service life of materials and components exposed to repeated mechanical loads is limited, which is why the understanding of the damage evolution and estimating its fatigue life is of high importance for its technical application. This paper shows how temperature and magnetic field measurement methods can be used to describe the cyclic deformation behaviour of metallic materials and to derive parameters from this, which are used in short-term methods to calculate the fatigue life. Within the SteBLife (stepped-bar fatigue life) approach, only three to five fatigue tests with a stepped fatigue specimen are required to determine a complete S–N or Woehler curve with scatter bands for different failure probabilities. If only a trend S–N curve is required, the number of tests can be reduced to a single fatigue test only. In the framework of this paper, these approaches will be presented for normalised SAE 1045 (C45E) and quenched and tempered SAE 4140 (42CrMo4) steels.

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Application of the weakest link analysis to the area of fatigue design of steel welded joints

Cited by 24 publications

References 15 publications

Fatigue fracture cross-sections after cyclic tests with a combination of cyclic bending and torsion of samples made of aluminum alloy 6060

Fatigue fracture cross-sections after cyclic tests with a combination of cyclic bending and torsion of samples made of aluminum alloy 6060

Fatigue Life of 7005 Aluminum Alloy Cruciform Joint Considering Welding Residual Stress

SteBLife, a New Approach for the Accelerated Generation of Metallic Materials’ Fatigue Data

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