An improved fatigue damage model based on the virtual load spectrum of golden section method

Liu, Yating; Ye, Nanhai; Hu, Xiulin; Zhao, Gongwei

doi:10.1111/ffe.13481

Cited by 10 publications

(4 citation statements)

References 35 publications

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“…These intervals are defined by the upper and lower boundary values of max j C and min j C . The improved golden section method is used to determine the five standard cloud eigenvalues, taking into account expert scoring habits 51 . He value of 0.1, the specific values of the 2D standard cloud were calculated using Equation ( 21)-Equation ( 23) and are presented in Table 7.…”

Section: W W W Ex En Hementioning

confidence: 99%

Risk Assessment of Equipment Research Project Costs Based on FAHP-CRITIC Combined Weights for 2D Cloud Models

Zhu,

Sun,

Chen

et al. 2024

Preprint

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The development process of equipment research projects is fraught with uncertainties, making it challenging to provide an accurate and objective evaluation of their development costs. To enhance the accuracy of cost prediction for equipment research projects, it is essential to consider the cost risk level and conduct relevant research on cost risk assessment. This study proposes an improved two-dimensional cloud model that integrates qualitative concepts and quantitative data for researching equipment projects. An assessment index system is constructed with three primary indicators and twelve secondary indicators. The main factors affecting the cost are comprehensively considered. The probability of overspending and the degree of impact of overspending are taken as the basic variables for assessing each indicator according to the definition of cost risk. The study combined the Fuzzy Analytic Hierarchy Process (FAHP) method with the Criteria Importance Though Intercrieria Correlation (CRITIC) method using the cooperative game method to determine the weights of each assessment indicator. Subsequently, a two-dimensional cloud model was established to obtain the cloud eigenvalues. A two-dimensional cloud diagram was drawn through MATLAB to initially determine the risk level, and the closeness was calculated to accurately determine the results. Finally, using a specific anti-mine system as an example, we verified the validity and feasibility of the model by comparing it with the traditional method. The results demonstrate that the improved two-dimensional cloud model can overcome the ambiguity and randomness of data in cost risk assessment and can provide a reference for other scientific research projects of the same type.

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Section: W W W Ex En Hementioning

confidence: 99%

Risk Assessment of Equipment Research Project Costs Based on FAHP-CRITIC Combined Weights for 2D Cloud Models

Zhu,

Sun,

Chen

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Based on the increasing theoretical research on CCF fatigue damage accumulation in turbine blades, some fatigue life prediction models under CCF loading conditions have been proposed. [42][43][44][45][46][47][48][49][50][51] For instance, based on damage mechanics theory, Han et al 48 proposed a life prediction model for CCF. The prediction model has been verified by experimental results, and a method for determining the allowable aluminized position in turbine blades is proposed.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, many researchers have focused on the CCF life prediction model. Based on the increasing theoretical research on CCF fatigue damage accumulation in turbine blades, some fatigue life prediction models under CCF loading conditions have been proposed 42–51 …”

Section: Introductionmentioning

confidence: 99%

On the consideration of loading interaction in combined high and low cycle fatigue life prediction

Liu

Wang

Shen

et al. 2023

Fatigue Fract Eng Mat Struct

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Based on the analysis of the test data and Miner's rule, a combined high and low cycle fatigue (CCF) life prediction model considering the loading interaction is established by introducing coupled damage. The coupled damage is determined by multiplying the high cycle fatigue damage and the low cycle fatigue damage by a coupled damage coefficient K. According to the analysis of the test data, the coupled damage coefficient K is positively correlated with the high cycle stress ratio R. In addition, an interaction factor, which reflects the loading interaction effect, is introduced to correct the coefficient K. The CCF experimental data of four materials are employed for model verification and comparison among the proposed model, Miner's rule, and Trufyakov-Kovalchuk model (T-K model). The proposed model exhibits a relatively higher prediction accuracy and is more suitable for predicting the fatigue life of CCF. K E Y W O R D S combined high and low cycle fatigue, coupled damage, fatigue life, loading interaction Highlights 1. A combined fatigue life prediction model is proposed considering loading interaction.2. Coupled damage coefficient is determined through analysis of the test data. 3. The proposed model exhibits a relatively higher prediction accuracy.

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“…Investigation of surface roughness and slip rate on contact fatigue life. Zaretsky [24][25][26][27][28][29] 's study showed that surface roughness of parts would affect the distribution of surface contact stress, which would lead to the phenomenon of contact stress concentration of parts and increase the wear amount of parts surface. Ne'lias et al 30 evaluated the influence of inclusions, surface roughness, and operating conditions on rolling contact fatigue of AISI 52100 and M50 bearing steels, and studied the influence of inclusion location and roughness size on crack initiation and propagation life.…”

Section: Introductionmentioning

confidence: 99%

A rolling contact fatigue health prediction model based on load interaction and damage energy accumulation

Hao

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Rolling contact is one of the main contact modes of all kinds of mechanical equipment at present. This investigation studied the rolling contact fatigue behaviors under various slip ratios and surface roughness with the consideration of loading history, loading sequence, and mutual influence between different load levels. In this paper, a fatigue crack initiation life prediction model based on strain energy accumulation caused by slip dislocations is proposed. The effect of increasing slip dislocation density and friction resistance on strain energy accumulation under alternating load is studied. The experimental results show that compared with the existing models, the proposed model can effectively improve the prediction accuracy of contact fatigue life under variable stress loading.

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An improved fatigue damage model based on the virtual load spectrum of golden section method

Cited by 10 publications

References 35 publications

Risk Assessment of Equipment Research Project Costs Based on FAHP-CRITIC Combined Weights for 2D Cloud Models

Risk Assessment of Equipment Research Project Costs Based on FAHP-CRITIC Combined Weights for 2D Cloud Models

On the consideration of loading interaction in combined high and low cycle fatigue life prediction

A rolling contact fatigue health prediction model based on load interaction and damage energy accumulation

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