Evaluation of crack growth direction criteria on mixed-mode fatigue crack growth experiments

Floros, Dimosthenis; Ekberg, Anders; Larsson, Fredrik

doi:10.1016/j.ijfatigue.2019.04.013

Cited by 22 publications

(3 citation statements)

References 38 publications

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“…In the same way, Floros et al (2019) using maximum shear stress range and vector cracktip displacement managed to satisfactorily relate the relationship between stresses and crack growth. Zhu et al (2018) also tried to develop a method for crack characterization using continuous wavelet transform.…”

Section: Introductionmentioning

confidence: 90%

Lichtenberg optimization algorithm applied to crack tip identification in thin plate-like structures

Pereira

Chuman

Cunha

et al. 2020

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Purpose This study aims to develop a numerical identification and characterization of crack propagation through the use of a new optimization metaheuristics called Lichtenberg optimization. Design/methodology/approach The damage-identification problem is treated as an inverse problem, which combines finite element methods with intelligent computational methods to obtain the best possible response. To optimize the objectives, the Lichtenberg algorithm is applied, which includes concepts of random cluster growth in nature. Findings The simulations show that it is possible to determine the Lichtenberg spectrum algorithm a part of the structure to be removed and replaced in this case to stop the propagation. Originality/value The results show a very good crack identification in plates-like structures using the Lichtenberg algorithm (LA) based only in strain fields. Although many studies have reported on damage-identification-based optimization methods, very few have focused on the crack tip modeling and LA as the main solver.

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Section: Introductionmentioning

confidence: 90%

Lichtenberg optimization algorithm applied to crack tip identification in thin plate-like structures

Pereira

Chuman

Cunha

et al. 2020

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“…2) Maximum Tangential Stress (MTS) criterion proposed by Redogan and Sih [27]; 3) Maximum Strain Energy (SED) criterion proposed by Sih [28]. Based on Floros et al [29] study of the predictive power of different crack growth direction criteria through finite element simulations, this paper selects MTS to simulate the crack deflection path, and the criterion assumes that the crack growth direction is determined by circumferential stress σ θ θ . It can be expressed as follows:…”

Section: Methods For Determining Crack Growth Deflection Anglementioning

confidence: 99%

An Approach to Predicting Fatigue Crack Growth Under Mixed-Mode Loading Based on Improved Gaussian Process

et al. 2021

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This paper proposes an approach to predicting fatigue crack growth under mixed-mode loading based on improved Gaussian process. In terms of analyzing the theoretical background for fatigue crack growth, a corresponding finite element model is built to generate sufficient simulation data, which is utilized to obtain the key parameters (e.g., stress intensity factor) for the fatigue crack growth process. And then, a Gaussian process model is achieved to meet the condition that the stress intensity factor is a nonlinear continuous change in crack growth, especially for mixed-mode loading. Following, an idea of local sample densification method is implemented to improve Gaussian sample generation process according to the simplified model of the crack growth path. Based on the above investigation, a fatigue crack growth prediction model using the improved Gaussian process is finished, which is subsequently verified through the test data of lower bainite steel (SCM435) material. The results show that the proposed approach has better computational accuracy and efficiency than the traditional finite element method in predicting fatigue crack growth under mixed-mode loading.INDEX TERMS Fatigue crack growth, mixed-mode, improved Gaussian process, sample space, local sample densification.

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“…RCF is characterized by its complex stress components (hertzian stress), a negative stress triaxiality, high gradients, and non-proportional mixed-mode loading that it induces [3,[6][7][8][9][10]. Classical bifurcation criteria do not allow a reliable prediction of the crack path for this kind of loading [11][12][13][14][15]. Theoretical or numerical works on the influence of biaxial compression on the bifurcation of a closed crack loaded in mode II can be found in the literature, among which those of Melin [16], Frelat and Leblond [17], Li et al [18].…”

Section: Introductionmentioning

confidence: 99%

Fatigue crack growth in bearing steel under cyclic mode II + static biaxial compression

Zaid

Bonnand

Doquet

et al. 2022

International Journal of Fatigue

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Evaluation of crack growth direction criteria on mixed-mode fatigue crack growth experiments

Cited by 22 publications

References 38 publications

Lichtenberg optimization algorithm applied to crack tip identification in thin plate-like structures

Lichtenberg optimization algorithm applied to crack tip identification in thin plate-like structures

An Approach to Predicting Fatigue Crack Growth Under Mixed-Mode Loading Based on Improved Gaussian Process

Fatigue crack growth in bearing steel under cyclic mode II + static biaxial compression

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