Energy models for fatigue life estimation under uniaxial random loading. Part II: Verification of the model

Łagoda, Tadeusz

doi:10.1016/s0142-1123(01)00017-2

Cited by 37 publications

(29 citation statements)

References 7 publications

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“…From constant amplitude fatigue tests on smooth specimens in fully reversed ten- The fatigue limit is s af = 252 MPa which corresponds to N o = 1.25 × 10 6 cycles according (18) [1,2,4,19,21]. Specimens similar to those tested under constant amplitude loading were subjected to tests under random loading for tension-compression with the zero expected mean value and the parameters included into Table 1.…”

Section: Fatigue Test Conditions and Resultsmentioning

confidence: 99%

“…A change of strain energy density, applied in theory of plasticity, has been proposed as a parameter to describe multiaxial fatigue [1][2][3][4]. In order to distinguish the work under tension and compression during a uniaxial fatigue cycle, Łagoda and Macha introduce the functions sgn[s(t)] and sgn[e(t)] as follows,…”

Section: The Strain Energy Density Parametermentioning

confidence: 99%

“…From among the cyclic counting methods, the rainf ow algorithm and the Palmgren-Miner hypothesis of damage accumulation have been chosen [1,2,4]. The life time, T RF is calculated from cycles and half-cycles in the time observation T o of stress history s(t),…”

Section: The Strain Energy Density Parametermentioning

confidence: 99%

“…Lately [1][2][3][4], the strain energy density parameter has been proposed for fatigue life evaluation. This parameter seemed to be efficien in the case of fatigue life determination based on a cycle counting method [1,2,4]. The energy para-meter includes the strain and stress histories and keeps the frequency character of the loading.…”

Section: Introductionmentioning

confidence: 99%

“…This paper deals with the comparison of some selected models of fatigue life estimation under stationary non-Gaussian random axial loading on the basis of experimental data obtained for the 10HNAP steel in high cycle fatigue (HCF). In this paper the following models for multiaxial loading are analyzed and their predictions compared with experiments: SmithWatson-Topper damage parameter used by BannantineSocie [5], Fatemi-Socie [5,6], Socie for HCF [7], WangBrown [8,9], Morel [10,11] and Łagoda-Macha [1][2][3][4]. n in spherical coordinates system m s = l 0 variance of a stress history s(t) s a max maximum amplitude in the history of stress after cycle counting by means of the rainf ow algorithm s af fatigue limit in fully reversed tension-compression y angle, from f xed axis in the plane P n →, to def ne the direction where the resolved shear stress is computed…”

Section: Introductionmentioning

confidence: 99%

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Fatigue life under non-Gaussian random loading from various models

Banvillet

2004

International Journal of Fatigue

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractFatigue test results on the 10HNAP steel under constant amplitude and random loading with non-Gaussian probability distribution function, zero mean value and wide-band frequency spectrum have been used to compare the life time estimation of the models proposed by Bannantine, Fatemi-Socie, Socie, Wang-Brown, Morel and Łagoda-Macha. Except the Morel proposal which accumulates damage step by step with a proper methodology, all the other models use a cycle counting method. The rainflow algorithm is used to extract cycles from random histories of damage parameters in time domain. In the last model, where a strain energy density parameter is employed, additionally spectral method is evaluated for fatigue life calculation in the frequency domain. The best and very similar results of fatigue life assessment have been obtained using the models proposed by Socie and by Łagoda-Macha, both in time and frequency domains for the last one.

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Section: Fatigue Test Conditions and Resultsmentioning

confidence: 99%

Section: The Strain Energy Density Parametermentioning

confidence: 99%

Section: The Strain Energy Density Parametermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fatigue life under non-Gaussian random loading from various models

Banvillet

2004

International Journal of Fatigue

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Comparison of different methods for presenting variable amplitude loading fatigue results

Łagoda

Sonsino

2004

Materialwissenschaft Werkst

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This paper discusses eight methods for presenting fatigue test results for variable amplitude loading and their comparison with constant amplitude loading. While the maximum amplitude method compares constant and variable amplitude loading results by the Woehler and Gassner curves, all other seven methods try to transform the variable amplitude results into the Woehler curve by applying different equations. The advantage of the maximum amplitude method is the direct comparison of the maximum amplitude of the spectrum with the yield strength and with the high-cycle fatigue strength, which is an important step in structural design. Among the other methods, the best results were obtained by following: most damaging, half damage and mean damage amplitudes. However, the presentation of constant and variable amplitude results by these methods in one scatter band is possible only when the real damage sum is close to D = 1.0

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Ermüdungsfestigkeit

2007

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Energy models for fatigue life estimation under uniaxial random loading. Part II: Verification of the model

Cited by 37 publications

References 7 publications

Fatigue life under non-Gaussian random loading from various models

Fatigue life under non-Gaussian random loading from various models

Comparison of different methods for presenting variable amplitude loading fatigue results

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