Analysis of biaxial proportional low-cycle fatigue crack propagation for hull inclined-crack plate based on accumulative plasticity

Deng, Junlin; Tu, Wenling; Dong, Qi; Dong, Dawei; Qiu, Shenglin

doi:10.1007/s42452-021-04921-w

Cited by 2 publications

(1 citation statement)

References 20 publications

(23 reference statements)

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“…The values of G th /G c and G pl / G C are the default values set in Abaqus, and the values of C and m can be obtained by consulting the literature. 18 According to the literature review 19,20 and simulation calculation, the initial setting values of parameters C 1 , C 2 , G 1c , G 2c , and G 3c are obtained, respectively, used as prior parameter values. C 3 and C 4 need to be converted by the parameters C and m of the Paris Law.…”

Section: Analysis Of Uncertain Factorsmentioning

confidence: 99%

Prediction of fatigue crack propagation based on dynamic Bayesian network

Wang

Yang

et al. 2022

Advances in Mechanical Engineering

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To address the problem of low prediction accuracy in the current research on fatigue crack propagation prediction, a prediction method of fatigue crack propagation based on a dynamic Bayesian network is proposed in this paper. The Paris Law of crack propagation and the extended finite element method (XFEM) are combined to establish the state equation of crack propagation. The uncertain factors of crack propagation are analyzed, and the prediction model of fatigue crack propagation based on the dynamic Bayesian network is constructed. A Bayesian inference algorithm based on the combination of Gaussian particle filter and firefly algorithm is proposed. The fatigue experiment of the specimen with the pre-cracks is carried out to test the correlation between the fatigue load cycles and the crack propagation depth. The experimental results show that the crack propagation prediction method proposed in this paper can effectively improve the prediction accuracy of crack propagation depth.

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Section: Analysis Of Uncertain Factorsmentioning

confidence: 99%

Prediction of fatigue crack propagation based on dynamic Bayesian network

Wang

Yang

et al. 2022

Advances in Mechanical Engineering

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Model for Calculating Stress Intensity Factors for an Inclined Crack at the Leading Edge of a Gas Turbine Engine Blade Under the Influence of Centrifugal Forces

Andrianov,

Chepurnova

2024

International Journal of Mechanics

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The study is devoted to the issue of the destruction of a body with an inclined crack during rotation. A mathematical model for calculating stress intensity factors in a rectangular plate with an inclined crack under the influence of centrifugal tensile forces during rotation around an axis lying in the plane of the plate is constructed in the article. Based on the equations of the theory of elasticity and the principles of brittle fracture mechanics, relationships were obtained that relate the stress intensity factors of type I and II, the rotation speed and geometry of the plate, as well as the parameters of the crack: length, angle of inclination to the axis of rotation, distance from the axis of rotation to the crack. The complexity of the study is because the plate in question with an inclined crack is under the action of mass forces. Therefore, the values of the effective stresses are not the same along the crack edge. Accordingly, stress intensity factors will depend on the location of the crack relative to the axis of rotation. The influence of the crack location and plate rotation speed on the change in stress intensity factor values is analyzed based on the results obtained. As the distance from the axis of rotation to the crack increases, the values of the stress intensity factors decrease. As the plate rotation frequency increases, the stress intensity coefficients increase according to a parabolic law. The results of the study can be used to assess the limit state of the rotating blades of a gas turbine engine in the presence of an inclined crack. The mathematical model can find practical application for assessing the critical speed regime of blade rotation in the presence of cracks of various lengths and angles of inclination to the rotation axis.

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Analysis of biaxial proportional low-cycle fatigue crack propagation for hull inclined-crack plate based on accumulative plasticity

Cited by 2 publications

References 20 publications

Prediction of fatigue crack propagation based on dynamic Bayesian network

Prediction of fatigue crack propagation based on dynamic Bayesian network

Model for Calculating Stress Intensity Factors for an Inclined Crack at the Leading Edge of a Gas Turbine Engine Blade Under the Influence of Centrifugal Forces

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