An energy dissipation-based fatigue crack growth model

Wang, X.G.; Huo, Ran; Jiang, Chao; Fang, Qihong

doi:10.1016/j.ijfatigue.2018.05.018

Cited by 42 publications

(16 citation statements)

References 50 publications

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“…In case of kinetic energy greater than zero (dW k > 0), the semi-infinite crack will unstably propagates. The energy rate is defined as being the energy released during the propagation of the semi-infinite crack [20]. By definition, it is given as follows: Griffith [11], the propagation of the semi-infinite crack is ensured when the energy rate is greater than twice the characteristic surface energy of the material (G > 2 ).…”

Section: Brittle Failure Theorymentioning

confidence: 99%

Influence of micro-crack on the propagation of a semi-infinite crack

Benzahar¹,

Said²,

Chabaat

2020

Preprint

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The main objective of this research is to determine the influence of micro-crack on the propagation of a semi-infinite crack. This study is mainly based on the determination of the strain energy during the interaction between the semi-infinite crack and the neighboring microcrack. The problem is formulated by a plane element, having a micro-crack varies around itself and around a semi-infinite crack. The cracked element is subjected to a uniform load according to mode I. The theoretical analysis of the strain energy is based on the stress found during the propagation of the semi-infinite crack. During the positioning of the micro-crack with respect to the semi-infinite crack, according to the strain energy results, the presence of the micro-crack can amplify, reduce and sometimes arrest the propagation of the semi-infinite crack.

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Section: Brittle Failure Theorymentioning

confidence: 99%

Influence of micro-crack on the propagation of a semi-infinite crack

Benzahar¹,

Said²,

Chabaat

2020

Preprint

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“…Naderi and Khonsari [ 31 ] stated that entropy is produced by the plastic work divided by temperature. The plastic work is mostly (around 90% for steels) dispersed into heat, and the remaining tiny portion in the material partakes in microstructural evolution [ 32 ]. The measurement of entropy production aims to assess the material damage.…”

Section: Theoretical Model Based On Entropy Generationmentioning

confidence: 99%

Prediction of Fatigue Crack Growth Rate Based on Entropy Generation

Idris

Abdullah

Thamburaja

et al. 2019

Entropy

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This paper presents the assessment of fatigue crack growth rate for dual-phase steel under spectrum loading based on entropy generation. According to the second law of thermodynamics, fatigue crack growth is related to entropy gain because of its irreversibility. In this work, the temperature evolution and crack length were simultaneously measured during fatigue crack growth tests until failure to ensure the validity of the assessment. Results indicated a significant correlation between fatigue crack growth rate and entropy. This relationship is the basis in developing a model that can determine the characteristics of fatigue crack growth rates, particularly under spectrum loading. Predictive results showed that the proposed model can accurately predict the fatigue crack growth rate under spectrum loading in all cases. The root mean square error in all cases is 10−7 m/cycle. In conclusion, entropy generation can accurately predict the fatigue crack growth rate of dual-phase steels under spectrum loading.

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“…Many fatigue studies using infrared thermographic methods have been carried out, including estimating fatigue limit [ 6 , 7 , 8 ], predicting fatigue life [ 9 , 10 , 11 ], monitoring fatigue damage evolution [ 1 , 12 , 13 , 14 ], studying the effect of free surface and mean stress [ 15 ], characterizing microplasticity [ 16 , 17 , 18 ], and modeling fatigue crack growth [ 19 , 20 , 21 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Thermographic Study of AZ31B Magnesium Alloy under Cyclic Loading: Temperature Evolution Analysis and Fatigue Limit Estimation

et al. 2020

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In this paper, infrared thermography was employed to study the fatigue process of AZ31B magnesium alloy. In order to eliminate the interference caused by the temperature rise of the fixture, a data processing method was proposed, which is based on a special model to describe the temperature change of the specimen. Based on the temperature data after processing, the temperature evolution indicates that AZ31B magnesium alloy has undergone cyclic hardening during fatigue. Three different temperature indicators were selected to evaluate the fatigue limit based on the evolution curve after processing. In addition, the experimental results showed that the temperature data processed by the proposed method can be used to estimate the fatigue limit of AZ31B magnesium alloy. Experiments were performed for both extrusion and transverse directions in consideration of the anisotropy of the AZ31B.

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An energy dissipation-based fatigue crack growth model

Cited by 42 publications

References 50 publications

Influence of micro-crack on the propagation of a semi-infinite crack

Influence of micro-crack on the propagation of a semi-infinite crack

Prediction of Fatigue Crack Growth Rate Based on Entropy Generation

Thermographic Study of AZ31B Magnesium Alloy under Cyclic Loading: Temperature Evolution Analysis and Fatigue Limit Estimation

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