Combined action of crack closure and residual stress under periodic overloads: A fractographic analysis

Sunder, R.; Андроник, А. В.; Biakov, A.; Еремин, А. В.; Panin, S. V.; Савкин, А. Н.

doi:10.1016/j.ijfatigue.2015.09.025

Cited by 34 publications

(4 citation statements)

References 8 publications

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“…Moreover, several physical mechanism models are established to predict the fatigue crack growth under random loading, such as crack closure models, [9][10][11] residual stress models, 12,13 and plasticity models. 14,15 These models aim to investigate the general physical description of the interaction effects under different random loading cases. Since it is widely recognized that the plasticity-induced crack closure can be directly observed and give a comparatively accurate results in metal structures, 16 a crack closure model is used in this article to quantify the loading interaction effect under random loading condition.…”

Section: Introductionmentioning

confidence: 99%

Time-variant fatigue reliability evaluation of riveted lap joint under stationary random loading

Jiang

2020

Proceedings of the Institution of Mechanical Engineers, Part O:

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This article focuses on the time-variant reliability assessment of riveted lap joint structure subjected to fatigue. A physics-based fatigue crack growth model that can take the crack closure into account is derived to calculate the crack length at different time under arbitrary loading. In addition, several uncertainties are quantified, including the material, initial crack size, and loading condition. The stationary random loading is a common service environment in practice, in which the stress range and stress ratio vary with constant statistical characteristics (the mean and standard deviation). The time-variant fatigue reliability of riveted lap joint under stationary random loading is assessed by introducing the outcrossing concept. The experimental data of 2024-T3 aluminum alloy riveted lap joint under constant amplitude loading are used to validate the physics-based fatigue crack growth model. It is verified that this proposed model can predict the fatigue life probability distribution with a reasonable accuracy. In addition, the simulation of riveted lap joint under stationary random loading is performed. The time-variant fatigue reliability is evaluated. The results with or without considering crack closures are also compared. It is noted that the results from the time-variant fatigue reliability assessment considering crack closure has higher reliability level.

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Section: Introductionmentioning

confidence: 99%

Time-variant fatigue reliability evaluation of riveted lap joint under stationary random loading

Jiang

2020

Proceedings of the Institution of Mechanical Engineers, Part O:

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“…Understanding the crack growth behavior under such complex loading is essential for estimating their useful life and enhancing their operational reliability . The variant induced by load(s), such as single and periodic overload and underload, challenges traditional methodologies in characterizing crack growth mechanisms . Hence, a robust model that can accurately predict crack growth rate and fatigue life under complex loading conditions would be highly beneficial for a wide range of structural applications.…”

Section: Introductionmentioning

confidence: 99%

An online‐offline prognosis model for fatigue life prediction under biaxial cyclic loading with overloads

Datta

Chattopadhyay

et al. 2019

Fatigue Fract Eng Mat Struct

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This paper presents a robust online‐offline model for the prediction of crack propagation under complex in‐phase biaxial fatigue loading in the presence of overloads of different magnitudes. The online prognosis model comprises a combination of finite element analysis and data‐driven regression to predict the crack propagation under constant loading, while the offline model is trained using experimental data to inform the post‐overload crack growth retardation behavior to the online model. The developed methodology is validated by conducting biaxial fatigue experiments using aluminum AA7075‐T651 alloy cruciform specimens. A close correlation is observed between the experimental results and model predictions. The results show that the model successfully predicts the crack retardation behavior under the influence of overloads with different magnitudes occurring at different stages of fatigue crack growth. Error analysis is conducted to investigate the sensitivities of the number of training points and crack increments to the prediction accuracy. In addition, the error propagation with respect to the crack length is studied, which provides constructive suggestions for further model improvement.

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“…The causes of such retardation have been imputed to various phenomena that take place during the occurrence of the overload, such as residual stress generation, plastic deformation and the consequent plasticity-induced crack closure, and work hardening. However, no clear consensus has been reached regarding the relative significance of these mechanisms [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Separating plasticity-induced closure and residual stress contributions to fatigue crack retardation following an overload

Salvati

Zhang

Fong

et al. 2017

Journal of the Mechanics and Physics of Solids

117

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Combined action of crack closure and residual stress under periodic overloads: A fractographic analysis

Cited by 34 publications

References 8 publications

Time-variant fatigue reliability evaluation of riveted lap joint under stationary random loading

Time-variant fatigue reliability evaluation of riveted lap joint under stationary random loading

An online‐offline prognosis model for fatigue life prediction under biaxial cyclic loading with overloads

Separating plasticity-induced closure and residual stress contributions to fatigue crack retardation following an overload

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