Notch fatigue fracture and crack growth behaviors on a steel sheet under out-of-plane bending

Oh, Gyoko

doi:10.1016/j.engfracmech.2023.109062

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…From the ANOVA results, it can be observed that increasing the applied load and hole diameter leads to lower means for fatigue life. [42] studies similar occurrence in crack propagation in hole specimens, and found similar results. However, the S/N ratios show variations in the response, indicating the influence of noise factors.…”

Section: Analysis Of S/n Ratiossupporting

confidence: 66%

Bir Havacılık Elastoplastik Yapısal Delikli Silindirik Bileşenin Döngüsel Mekanik Yük Altında COMSOL Multiphysics ve Taguchi Metodu Optimizasyonu ile Yorulma Analizi

TUR

2023

Bayburt Üniversitesi Fen Bilimleri Dergisi

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This research study focuses on the fatigue behavior of an aerospace elastoplastic cylindrical structural component with a hole subjected to cyclic mechanical loads. In the demanding operational environment of aerospace applications, the structural components, particularly those with stress concentrators like holes, experience cyclic loading conditions, leading to fatigue failure over time. The key objective of this study is to gain insights into this fatigue behavior, and to develop an optimized set of design and operational parameters that can enhance the fatigue performance of these components. Utilizing the robust finite element analysis capabilities of COMSOL Multiphysics, a comprehensive model of the elastoplastic cylindrical component is developed. The model captures the intricate effects of the hole, a typical stress raiser, on the fatigue performance under various cyclic mechanical loading conditions. A detailed fatigue analysis is then performed using this model, providing valuable insights into the fatigue life and failure patterns of the component. To enhance the fatigue performance, the Taguchi method, a statistical approach, is employed. This method helps to identify and optimize the key design and operational parameters influencing the fatigue life. The parameters are optimized based on their signal-to-noise ratio, with an aim to maximize the fatigue life and ensure the structural integrity of the component under operational cyclic loads. The findings of this research hold significant implications for the design and manufacturing of aerospace structural components, with potential benefits of improved safety, enhanced durability, and reduced maintenance requirements. However, the results' applicability might be limited by the complexity of real-world operational conditions and the assumptions made in the simulation model. Future studies can validate and enhance these results by incorporating more complex loading scenarios and real-world case studies.

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Section: Analysis Of S/n Ratiossupporting

confidence: 66%

Bir Havacılık Elastoplastik Yapısal Delikli Silindirik Bileşenin Döngüsel Mekanik Yük Altında COMSOL Multiphysics ve Taguchi Metodu Optimizasyonu ile Yorulma Analizi

TUR

2023

Bayburt Üniversitesi Fen Bilimleri Dergisi

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“…The crack propagation threshold of pure iron is about 9 MPa•m 1/2 (Yu et al ., 1984), and that of hot-rolled 16Mn steel is about 10.8 MPa•m 1/2 at room temperature (Song et al ., 2019). When the stress intensity factor at the tip of the initial microcrack reaches the value of K th , the crack will enter a stable propagation stage in accordance with the Paris law (Oh, 2023) and eventually lead to fatigue failure. The calculated crack propagation threshold of rolled Fe-13Cr-4Al is slightly higher than that of the compositions mentioned above, indicating that it extends specimen fatigue life.…”

Section: Discussionmentioning

confidence: 99%

Effect of rolling on crack behavior of FeCrAl alloys in ultra-long life

Zhan,

Dai,

Liu

et al. 2023

IJSI

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PurposeThe purpose of this paper is to determine (1) the relationship between microstructure and fatigue cracking behavior and (2) effect of rolling on the process of crack initiation and propagation in FeCrAl alloys.Design/methodology/approachThe qualitative and quantitative fracture studies were performed using scanning electron microscopy and the non-contact optical measurement system (IFMG5).FindingsThe results show that the formation of facets, rough facets and parallel stripes in the crack initiation and early crack propagation zones are closely related to the sensitivity of crack behavior to the microstructure of the material. Besides, the rolling process has a significant influence on the small crack initiation and propagation behavior. Quantitative analysis demonstrates that the size of the stress intensity factor and plastic zone size in the rough zone is associated with the rolling process.Originality/valueThe findings of this study have the potential to enhance the understanding of the microstructural crack formation mechanisms in FeCrAl alloys and shed light on the impact of rolling on the long-term and ultra-long fatigue behavior of these alloys. This new knowledge is vital for improving manufacturing processes and ensuring the safety and reliability of FeCrAl alloys used in nuclear industry applications.

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Crack Initiation and Propagation Mechanism of Flawed Rock Mass Based on Improved Maximum Distortion Energy Theory and PFC Numerical Simulation

Jing,

Cao,

Jing

et al. 2024

J Fail. Anal. and Preven.

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Notch fatigue fracture and crack growth behaviors on a steel sheet under out-of-plane bending

Cited by 6 publications

References 27 publications

Bir Havacılık Elastoplastik Yapısal Delikli Silindirik Bileşenin Döngüsel Mekanik Yük Altında COMSOL Multiphysics ve Taguchi Metodu Optimizasyonu ile Yorulma Analizi

Bir Havacılık Elastoplastik Yapısal Delikli Silindirik Bileşenin Döngüsel Mekanik Yük Altında COMSOL Multiphysics ve Taguchi Metodu Optimizasyonu ile Yorulma Analizi

Effect of rolling on crack behavior of FeCrAl alloys in ultra-long life

Crack Initiation and Propagation Mechanism of Flawed Rock Mass Based on Improved Maximum Distortion Energy Theory and PFC Numerical Simulation

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