Uncertainty in fatigue life prediction of structures subject to Gaussian loads

Bengtsson, Anders; Rychlik, Igor

doi:10.1016/j.probengmech.2008.06.004

Cited by 42 publications

(22 citation statements)

References 28 publications

(34 reference statements)

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“…Hence often R[D(T )] is much smaller than σ A and can be neglected. However, apart from the uncertainties in the loading, there could be other sources of uncertainties, such as, uncertainties in the system parameters which significantly affect the fatigue damage and R[D(T )] may no longer be negligible which should be calculated for safety assessments [17].…”

Section: Probability For Fatigue Failurementioning

confidence: 99%

Wiener chaos expansions for estimating rain-flow fatigue damage in randomly vibrating structures with uncertain parameters

Sarkar¹,

Gupta²,

Rychlik³

2011

Probabilistic Engineering Mechanics

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Section: Probability For Fatigue Failurementioning

confidence: 99%

Wiener chaos expansions for estimating rain-flow fatigue damage in randomly vibrating structures with uncertain parameters

Sarkar¹,

Gupta²,

Rychlik³

2011

Probabilistic Engineering Mechanics

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“…In the case when Gaussian models are used for stresses, there are many methods for estimating the expected damage indexes from the power spectrum density, psd, see eg. [2] for a review of different approaches. Much less is known for loads containing transients.…”

Section: Introductionmentioning

confidence: 99%

The Laplace multi-axial response model for fatigue analysis

Karlsson

Podgórski

Rychlik

2016

International Journal of Fatigue

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Abstract. This paper introduces means for fatigue damage rates estimation using Laplace distributed multiaxial loads. The model is suitable for description of stresses containing transients of random amplitudes and locations. Explicit formulas for computing the expected value of rainflow damage index as a function of excess kurtosis are given for correlated loads. A Laplace model is used to describe variability of forces and bending moments measured at some location on a cultivator frame. An example of actual cultivator data is used to illustrate the model and demonstrate the accuracy of damage index prediction.

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“…Yang and Jones [14] and Chou [15] assumed a twoparameter Weibull distribution of ultimate tensile strength for the prediction of fatigue life. Bengtsson and Rychik [16] and Rychlik and Gupta [17] studied fatigue damage by Gaussian loads.…”

Section: Introduction and Historical Reviewmentioning

confidence: 99%

Cumulative Damage Theory in Fatigue of Graphite/Epoxy [±45]_sComposites

An¹

2015

Composites Research

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ABSTRACT:The phenomenological evolution laws of damage can be defined either based on residual life or residual strength. The failure of a specimen can be defined immediately after or before fracture. The former is called in this paper by "failure defined by approach I" and the latter "failure defined by approach II. " Usually at failure there is a discontinuity of loading variables and, because of this, damage at failure is discontinuous. Therefore the values of damage at failure by two different approaches are not the same. Based on this idea the sequence effects of the phenomenological evolution law of damage given by dD/dN = g(D)f(Φ) were studied. Thin-walled graphite/epoxy tubes consisting of four of [±45] s laminates were used for the experimental study of sequence effects and the effects of mean stress on fatigue life. It was found that the sequence effects in two step uniaxial fatigue for [±45] s graphite/epoxy tubular specimen showed that a high-low block loading sequence was less damaging than a low-high one.

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Uncertainty in fatigue life prediction of structures subject to Gaussian loads

Cited by 42 publications

References 28 publications

Wiener chaos expansions for estimating rain-flow fatigue damage in randomly vibrating structures with uncertain parameters

Wiener chaos expansions for estimating rain-flow fatigue damage in randomly vibrating structures with uncertain parameters

The Laplace multi-axial response model for fatigue analysis

Cumulative Damage Theory in Fatigue of Graphite/Epoxy [±45]_sComposites

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Uncertainty in fatigue life prediction of structures subject to Gaussian loads

Cited by 42 publications

References 28 publications

Wiener chaos expansions for estimating rain-flow fatigue damage in randomly vibrating structures with uncertain parameters

Wiener chaos expansions for estimating rain-flow fatigue damage in randomly vibrating structures with uncertain parameters

The Laplace multi-axial response model for fatigue analysis

Cumulative Damage Theory in Fatigue of Graphite/Epoxy [±45]sComposites

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Cumulative Damage Theory in Fatigue of Graphite/Epoxy [±45]_sComposites