A correction in the algorithm of fatigue life calculation based on the critical plane approach

Karolczuk, Aleksander; Kluger, Krzysztof; Łagoda, Tadeusz

doi:10.1016/j.ijfatigue.2015.10.011

Cited by 44 publications

(20 citation statements)

References 32 publications

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“…Such an approach is correct only for materials that have parallel fatigue curves (m σ ∼ = m τ ). This fact has been noticed in, among others, papers (Kurek and Łagoda, 2012;Karolczuk and Kluger, 2014;Karolczuk et al, 2016).…”

Section: Introductionmentioning

confidence: 58%

Modification of the algorithm for calculating fatigue life for the criteria based on the concept of the critical plane

Kluger

Łagoda

2018

jtam

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The aim of this paper is to propose an algorithm for fatigue life determination with the use of widely-known criteria for the fatigue life considering proper determination of material characteristics, which are a function of the number of cycles to failure. The application of the modified algorithm has been presented within the criteria of Findley, Matake, Papadopoulos and Dang Van, and the results of calculations have been compared with test results for steels S355J2G3 and Ck45. For both materials analysed, the application of the modified algorithm in the fatigue criteria makes it possible to obtain much more precise results of the calculations for all types of the loading analysed.

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Section: Introductionmentioning

confidence: 58%

Modification of the algorithm for calculating fatigue life for the criteria based on the concept of the critical plane

Kluger

Łagoda

2018

jtam

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“…is dedicated to Kluger's stress criterion described in the aforementioned text. However, after minor modifications, it is possible to apply it to all other fatigue criteria based on the concept of critical plane . The form of the algorithm for comparative criteria was presented in Fig.…”

Section: Application Of the New Algorithm For Comparative Criteriamentioning

confidence: 99%

“…The following function was used for assessing the efficiency of fatigue models and suggested algorithms:

Pr ((), T) = Prob ((), \frac{N_{normalexp}}{T} \leq N_{c a l} \leq T \cdot N_{\exp})

and the resulting parameter:

T ((), Pr = 0.95),

…”

Section: Experimental Verificationmentioning

confidence: 99%

A new algorithm for estimating fatigue life under mean value of stress

Kluger

Łagoda

2016

Fatigue Fract Eng Mat Struct

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This paper discusses two problems: allowing for mean value of torsional stress and the variability of material properties with out of‐parallel fatigue characteristics. The effect of normal mean stress and shear mean stress is modified by reduction coefficients, which, to a large extent, depend on the value of existing loads. These coefficients have been developed experimentally on the basis of an analysis of the findings from fatigue tests on 2017A‐T4 and 6082‐T6 aluminium alloys and S355 alloy steel. The methods of calculation, suggested in this paper, are applicable to the materials in elastic–plastic state. The suggested algorithm for estimating fatigue life for the combination of bending or tension and compression and torsion under shear stress is based on Kluger's stress criterion. The usability of the algorithm was verified by comparing the calculation results with the results of own experimental tests on 2017A‐T4 and 6082‐T6 aluminium alloys, which have been noted to indicate sensitivity to shear mean stress, and the tests found in the professional literature (tests on S355, 30CrNiMo8 and 30NCD16 steel and Ti‐6Al‐4 V titanium alloy). A comparative analysis of the calculation and experimental results proved that there is a satisfactory correlation between them.

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“…number of cycles to failure), which is not true universally [14,15]. Material parameters are based on conventional values (yield stress, fatigue limit) that are strongly dependent on the methodology of determination and sometimes their existence itself is questionable (fatigue limit being the examplethere's no agreement on whether there is an actual amplitude of stress that isn't damaging).…”

Section: Multiaxial Fatigue Criterionmentioning

confidence: 99%

Multiaxial fatigue criterion based on parameters from torsion and axial S-N curve

Margetin

Ďurka²,

Chmelko³

2016

Frattura Ed Integrità Strutturale

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ABSTRACT. Multiaxial high cycle fatigue is a topic that concerns nearly all industrial domains. In recent years, a great deal of recommendations how to address problems with multiaxial fatigue life time estimation have been made and a huge progress in the field has been achieved. Until now, however, no universal criterion for multiaxial fatigue has been proposed. Addressing this situation, this paper offers a design of a new multiaxial criterion for high cycle fatigue. This criterion is based on critical plane search. Damage parameter consists of a combination of normal and shear stresses on a critical plane (which is a plane with maximal shear stress amplitude). Material parameters used in proposed criterion are obtained from torsion and axial S-N curves. Proposed criterion correctly calculates life time for boundary loading condition (pure torsion and pure axial loading). Application of proposed model is demonstrated on biaxial loading and the results are verified with testing program using specimens made from S355 steel. Fatigue material parameters for proposed criterion and multiple sets of data for different combination of axial and torsional loading have been obtained during the experiment.

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A correction in the algorithm of fatigue life calculation based on the critical plane approach

Cited by 44 publications

References 32 publications

Modification of the algorithm for calculating fatigue life for the criteria based on the concept of the critical plane

Modification of the algorithm for calculating fatigue life for the criteria based on the concept of the critical plane

A new algorithm for estimating fatigue life under mean value of stress

Multiaxial fatigue criterion based on parameters from torsion and axial S-N curve

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