An evaluation of multiaxial fatigue life assessment methods for engineering components

Das, Jayanta Kumar; Sivakumar, Srinivasan M.

doi:10.1016/s0308-0161(99)00053-8

Cited by 37 publications

(20 citation statements)

References 2 publications

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“…There are attempts to include different mechanisms of fatigue process (Mode I, II, III, stage I, stage II, etc.) to fatigue life calculation through: -application of several criteria based on different fracture mechanism; fatigue lifetime is established by a criterion based on the highest damage level (Das and Sivakumar, 1999), -summation of damage levels calculated according to several multiaxial criteria (Socie, 1987. 7.…”

Section: Summary Of the Research Statementioning

confidence: 99%

A Review of Critical Plane Orientations in Multiaxial Fatigue Failure Criteria of Metallic Materials

2005

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The paper presents a review of multiaxial fatigue failure criteria based on the critical plane concept. The criteria have been divided into three groups, according to the fatigue damage parameter used in the criterion, i.e. (i) stress, (ii) strain and (iii) strain energy density criteria. Each criterion was described mainly by the critical plane orientation. Multiaxial fatigue criteria based on the critical plane concept usually apply different loading parameters in the critical plane whose orientation is determined by (a) only shear loading parameters (crack Mode II or III), (b) only normal loading parameters (crack Mode I) or sometimes (c) mixed loading parameters (mixed crack Mode). There are also criteria based on few critical plane orientations and criteria based on critical plane orientations determined by a weighted averaging process of rotating principal stress axes.

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Section: Summary Of the Research Statementioning

confidence: 99%

A Review of Critical Plane Orientations in Multiaxial Fatigue Failure Criteria of Metallic Materials

2005

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“…Then, Kandi, Brown, and Miller proposed a specific form of the shear strain and the normal strain on the critical plane [6] , which is considered as a most common model. Recently, many researchers have defined the fatigue life as a combination of the shear strain (stress) and the normal strain (stress) on the maximum shear strain (stress) plane [7][8][9][10][11][12][13][14][15] . Wang and Brown presented a simple path-independent multiaxial fatigue damage criterion based on Brown and Miller's critical plane theory [11] .…”

Section: Introductionmentioning

confidence: 99%

Multiaxial fatigue life prediction of kiln roller under axis line deflection

Shen

Wang

et al. 2010

Appl. Math. Mech.-Engl. Ed.

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This paper investigates the multiaxial fatigue life of the roller in rolling contact with wheels with respect to axis line deflection. The multiaxial fatigue criteria proposed by Wang and Brown, together with the rainflow counting method and MinerPalmgren's rule, are applied to the cumulative damage estimation and life prediction. As the axis line deflection of overlong kilns generally results in asymmetric load distribution on each roller, the load ratio is introduced to describe the deflection for quantitative stress analyses. The stress analyses are performed within the finite element code ANSYS. The tangential friction stress is calculated in terms of the condition of the rolling contact area. By taking one roller as an example, the plotted fatigue life versus load ratio curve discovers how the axis line deflection affects the fatigue life. This study is significant to prevent the fatigue failure of the roller and can provide basis to adjust and optimize the axis line of the rotary kiln.

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“…[24], is a method to determine fatigue damage under multiaxial conditions. A chosen fatigue indicator parameter, FIP, is evaluated on all candidate planes, defined in 3D by the angles θ and θ R , as shown in Figure 6(a).…”

Section: Representation Of Multiaxial Fatigue Damagementioning

confidence: 99%

Development of life assessment procedures for power plant headers operated under flexible loading scenarios

Farragher

Scully²,

O’Dowd

et al. 2013

International Journal of Fatigue

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Publication InformationFarragher, TP, Scully, S, O Dowd, NP, Leen, SB (2013) 'Development of life assessment procedures for power plant headers operated under flexible loading scenarios'. International Journal Of Fatigue, 49 :50-61. PublisherElsevier ScienceDirect 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 Abstract A finite element methodology for thermomechanical fatigue analysis of a subcritical power plant outlet header under realistic loading conditions is presented. The methodology consists of (i) a transient heat transfer model, (ii) a sequential anisothermal cyclic viscoplastic model and (iii) a multiaxial, criticalplane implementation of the Ostergren fatigue indicator parameter. The methodology permits identification of the local thermomechanical stress-strain response at critical locations and prediction of fatigue life and cracking orientation for complex transient, anisothermal, cyclic elastic-plastic-creep material behaviour. Measured plant data, in the form of steam and pipe temperature transients and steam pressure data, are employed to identify heat transfer constants and validate the predicted thermal response, with particular attention given to plant start-up and attemperation effects. The predictions indicate out-of-phase temperature-strain response at the header inside surface and in-phase response on the outside surface. Cooling transients are predicted to control damage and crack initiation at the inner bore, whereas heating transients are predicted to have a more damaging effect at weld locations. A representative test cycle is presented, which is shown to capture the salient thermo-mechanical cyclic damage of the realistic cycle. The predicted results correlate well with industrial experience in terms of crack (initiation) orientation, location and life. IntroductionThere is a need to understand the performance of candidate power plant materials for higher temperatures and pressures. 9-12% Cr steels are an example of such candidate materials, owing to their excellent mechanical properties, and steels such as P91 and P92 are already being utilised in power generation plant [1]. There is an increasing trend towards shifting of energy supply from conventional fossil fuel power plant to sustainable energies, e.g. wind power. To allow for the variable nature of renewable energy supply, there is a requirement to operate existing plant, designed for 'base-load' operation, with relatively infrequent shutdown and start-up, in 'load-following' mode, characterised by increased frequency of shutdown and start-up. This issue has increased the importance of design and assessment of materials and components for high temperature, pressurised plant with respect to thermomechanical fatigue (TMF) and creep-fatigue failure.Current header design does not consider cyclic thermal stresses and load cycling that can lead to creep-f...

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An evaluation of multiaxial fatigue life assessment methods for engineering components

Cited by 37 publications

References 2 publications

A Review of Critical Plane Orientations in Multiaxial Fatigue Failure Criteria of Metallic Materials

A Review of Critical Plane Orientations in Multiaxial Fatigue Failure Criteria of Metallic Materials

Multiaxial fatigue life prediction of kiln roller under axis line deflection

Development of life assessment procedures for power plant headers operated under flexible loading scenarios

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