Multiaxial fatigue reliability assessment using a differential ant-stigmergy algorithm

Yu, Yonghun; Lee, Bora; Cho, Yongjoo

doi:10.1007/s12206-019-0413-z

Cited by 2 publications

(3 citation statements)

References 18 publications

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“…The probabilistic s-n curve has its source in the appropriate probability distribution for the fatigue life. From the studies performed on P-s-n distributions (e.g., References [ 24 , 25 , 26 , 27 ]), it can be found that, in most cases, researchers have applied different variants of a Weibull distribution. A variant of a Weibull distribution tailored for a logarithmically distributed random variable of the fatigue life of steel welded joints in a one-stage loading (i.e., a constant amplitude) was proposed by the author of Reference [ 4 ].…”

Section: Probability-modified Fatigue Damage Accumulation Modelmentioning

confidence: 99%

Non-Linear Probabilistic Modification of Miner’s Rule for Damage Accumulation

Blacha

2021

Materials

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A non-linear modification to Miner’s rule for damage accumulation is proposed to reduce the scatter between experimental fatigue life and fatigue life predicted according to the original Miner’s sum. Based on P-s-n probability distribution and design s-n curves, the modification satisfies the assumption of equality between the mean damage degree (at the critical level) and fatigue life random variables, which is not covered in the original formulation. The adopted formulation shows the discrepancies between the fatigue lives predicted according to the design s-n curves and the estimated probability distribution. It also proves that it is inappropriate to apply a normal distribution to fatigue life analysis and that the model becomes non-linear only for non-normal distributions. The predictions according to the established model were compared to the predictions obtained with Miner’s rule.

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Section: Probability-modified Fatigue Damage Accumulation Modelmentioning

confidence: 99%

Non-Linear Probabilistic Modification of Miner’s Rule for Damage Accumulation

Blacha

2021

Materials

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“…1,2 Therefore, it is of great importance to investigate the fatigue properties of notched specimens with different notch geometry parameters and give a unified fatigue life model. 3 The study of multiaxial fatigue is crucial to improve the strength and life of engineering components, which are often subjected to complex multiaxial loading during their service. 4 Ince and Glinka 5 proposed two different forms of multiaxial fatigue damage parameters related to the maximum fatigue damage plane and used them for fatigue life prediction under various loading conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The components served in actual engineering often have geometric discontinuities, which will lead to local stress concentrations and consequently fatigue damage 1,2 . Therefore, it is of great importance to investigate the fatigue properties of notched specimens with different notch geometry parameters and give a unified fatigue life model 3 …”

Section: Introductionmentioning

confidence: 99%

Multiaxial fatigue life prediction model with relative stress gradient and size effect

Liu

Zhao

Ran

et al. 2022

Fatigue Fract Eng Mat Struct

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To investigate the effects of notched root stress gradient and geometric size parameters on the fatigue performance of engineering components, a new multiaxial fatigue life prediction model is established. First, based on the energy-critical plane method, the location of the dangerous plane is determined with the help of finite element (FE) analysis. Second, the sixth-order multinomial stress function is used to study the stress/strain distribution state on the critical plane, and the relative stress gradient (RSG) function is used to find the stationary point to determine the RSG value and the magnitude of the fatigue damage zone boundary value. Specifically, for specimens with different notch types, the indexes to determine the high-stress influence zone and the size influence factor are proposed. Finally, a multiaxial fatigue life prediction model considering RSG and size effect is established, and the compared resultsshow that the new model has a high fatigue life prediction capability.

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Multiaxial fatigue reliability assessment using a differential ant-stigmergy algorithm

Cited by 2 publications

References 18 publications

Non-Linear Probabilistic Modification of Miner’s Rule for Damage Accumulation

Non-Linear Probabilistic Modification of Miner’s Rule for Damage Accumulation

Multiaxial fatigue life prediction model with relative stress gradient and size effect

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