Effect of single overload on fatigue crack growth in QSTE340TM steel and retardation model modification

Lu, Yun-chao; Yang, Fangzhou; Chen, Te

doi:10.1016/j.engfracmech.2019.03.029

Cited by 36 publications

(13 citation statements)

References 32 publications

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“…Therefore, crack arrest technology in crack propagation stage is widely used. For example overload technique [28][29][30], cold expansion [31][32][33][34], indentation (dimple) [35][36][37] and stop hole [30,35,[38][39][40][41][42]. A single overload causes crack closure, tip dullness and strain hardening near the tip.…”

Section: Introductionmentioning

confidence: 99%

“…A single overload causes crack closure, tip dullness and strain hardening near the tip. Lu et al [28] conducted several experiments on QSTE340TM automotive steel under a series of load ratios and overload ratios to study the relationship of single overload and crack propagation. Cold expansion refers to introduce a hole on the tip of crack, and then using an oversized steel ball to pass through the hole from one side to another side.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of crack propagation in fretting fatigue specimen repaired by stop hole method

Deng

Yin

Wang

et al. 2022

International Journal of Fatigue

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Fretting fatigue is a common structural failure phenomenon. It can greatly reduce the fatigue life of a structure, and because of the complexity of its load condition, it is a challenging research topic. This paper applies, for the first time, the widely used stop hole repair technology to a fretting fatigue specimen in crack propagation stage in order to extend its lifetime. LEFM approach is adopted for the crack propagation phase using Paris' law to predict the fatigue life. The critical plane parameter and variable length critical distance method are used together to predict the second crack initiation lifetime. This prediction method is validated by the central crack tensile fatigue experiment, which considers the stop hole. It is shown that the stop hole changes the propagation path and leads to a secondary crack initiation from the lower edge of hole. The increase of crack propagation life mainly comes from the secondary crack initiation. It is also found that the larger the radius of the stop hole, the greater the fatigue life is.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical analysis of crack propagation in fretting fatigue specimen repaired by stop hole method

Deng

Yin

Wang

et al. 2022

International Journal of Fatigue

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“…Bahram et al 12 used the Willenberg model to simulate the deceleration effect after applying an overload to 2024‐T351 aluminum alloy, and the results showed that the application of simple overload affects the crack rate, crack growth, and number of delay cycles. When Lu et al 13 studied and analyzed the fatigue crack growth behavior of QSTE340TM steel under a single tensile overload, they found that the load ratio and overload ratio had a greater impact on the fatigue crack growth behavior, and also proved the plasticity‐induced crack closure effect.…”

Section: Introductionmentioning

confidence: 99%

Study of overloading retardation on fatigue crack propagation behavior in 300M steel

Zhou

Shen

Wang

et al. 2022

Fatigue Fract Eng Mat Struct

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Based on the fatigue life change of 300M landing gear steel due to overload during service, this study innovatively designed four overload modes according to the actual load spectrum of the landing gear. In this study, the application of overload continued until the specimen failed, and the effects of overload ratio, overload type and specimen thickness on the crack propagation behavior of 300M steel were compared and analyzed. The fatigue crack growth rate and fracture morphology of the specimens were characterized and analyzed, and the influence mechanism of the crack growth rate at each stage under different types of overload conditions and the influence of the thickness of the specimen on the overload delay effect were discussed.

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“…This phenomenon is called overload retardation phenomenon. Lu et al [7] conducted a series of experiments on automobile steel under different load ratios and stress ratios, and then proposed a new SIF calculation method. Ding et al [8] carried out single overload and underload tests on the central crack specimen of Q345R steel.…”

Section: Introductionmentioning

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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Effect of single overload on fatigue crack growth in QSTE340TM steel and retardation model modification

Cited by 36 publications

References 32 publications

Numerical analysis of crack propagation in fretting fatigue specimen repaired by stop hole method

Numerical analysis of crack propagation in fretting fatigue specimen repaired by stop hole method

Study of overloading retardation on fatigue crack propagation behavior in 300M steel

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

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