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学者姓名：尚德广
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Abstract ：
The application of the Rayleigh model to the life prediction for broadband random vibration signals tends to be overly conservative. To address this issue, the spectral bandwidth coefficient was incorporated into the Rayleigh model in three different forms to modify the centrality, height, and width of the Rayleigh curve, thereby improving the predictive ability of the model for stress amplitude distribution in the medium-to-high stress range. Additionally, an exponential function was introduced to adjust the probability density distribution in the low-stress amplitude region. The proposed model can accurately reflect the stress amplitude distribution of various bandwidth signals in the low, medium, and high ranges, thereby improving the accuracy of predicting the life of random vibration signals. The vibration fatigue life prediction results for narrowband, non-typical bandwidth, and broadband signals are all within a factor of 2.
Keyword ：
Spectral width coefficient Spectral width coefficient Fatigue life prediction Fatigue life prediction Random vibration Random vibration Rayleigh Rayleigh Frequency domain method Frequency domain method
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| GB/T 7714 | Shi, Feng-Tian , Shang, De-Guang , Wu, Shao-Dong et al. Fatigue life prediction method based on Rayleigh model modified with spectral width coefficient for arbitrary bandwidth signals [J]. | MEASUREMENT , 2025 , 251 . |
| MLA | Shi, Feng-Tian et al. "Fatigue life prediction method based on Rayleigh model modified with spectral width coefficient for arbitrary bandwidth signals" . | MEASUREMENT 251 (2025) . |
| APA | Shi, Feng-Tian , Shang, De-Guang , Wu, Shao-Dong , Hao, Guo-Cheng , Zhou, Chang , Ma, Jing-Xin et al. Fatigue life prediction method based on Rayleigh model modified with spectral width coefficient for arbitrary bandwidth signals . | MEASUREMENT , 2025 , 251 . |
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Abstract ：
It is of paramount importance to accurately predict the maintenance demands of vehicles in order to guarantee their sustainable use. Nevertheless, the current methodologies merely predict a partial aspect of a vehicle's maintenance demands, rather than the comprehensive maintenance demands. Moreover, the process of predicting vehicle maintenance demands must give due consideration to the influence of mileage on such demands. In light of the aforementioned considerations, we put forth a vehicle overall maintenance demand prediction method that incorporates vehicle mileage awareness. In order to address the discrepancy between the vector space of mileage and that of the project, we put forth a mileage representation method for the maintenance demand prediction task. To capture the significant impact of key mileage and projects on future demand, we propose a learning module for key temporal information using a fusion of Long Short-Term Memory (LSTM) networks and attention mechanism. Moreover, to integrate maintenance mileage and projects, we propose a fusion method based on a gated unit. The experimental results obtained from real datasets demonstrate that the proposed model exhibits a superior performance compared to existing methods.
Keyword ：
gated unit gated unit vehicle maintenance vehicle maintenance demand prediction demand prediction attention mechanism attention mechanism maintenance mileage maintenance mileage maintenance project maintenance project long and short-term memory networks long and short-term memory networks
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| GB/T 7714 | Chen, Fanghua , Shang, Deguang , Zhou, Gang et al. Mileage-Aware for Vehicle Maintenance Demand Prediction [J]. | APPLIED SCIENCES-BASEL , 2024 , 14 (16) . |
| MLA | Chen, Fanghua et al. "Mileage-Aware for Vehicle Maintenance Demand Prediction" . | APPLIED SCIENCES-BASEL 14 . 16 (2024) . |
| APA | Chen, Fanghua , Shang, Deguang , Zhou, Gang , Ye, Ke , Ren, Fujie . Mileage-Aware for Vehicle Maintenance Demand Prediction . | APPLIED SCIENCES-BASEL , 2024 , 14 (16) . |
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Abstract ：
Fatigue failure mechanism of Ti60 titanium alloy under tension-torsion multiaxial loading in the very high cycle regime was studied first, and the results showed that the shear/axial stress ratio directly affects the failure mechanism. When the shear/axial stress ratio is relatively small, cracks tend to originate from the subsurface in single-point initiation mode, and the larger the shear/axial stress ratio, the more cracks tend to originate from the surface in multi-point initiation mode. Then, a pragmatic equivalent method for multiaxial to uniaxial load based on the law of shear/axial stress ratio on fatigue strength was proposed. Based on this method and uniaxial S-N curve, the fatigue lives of Ti60 specimens under shear/axial stress ratios of 1.37, 1.95, and 3.53 was predicted, and the experimental results showed that the prediction error is basically within a factor of 3.
Keyword ：
Titanium alloy Titanium alloy Life prediction Life prediction Very high cycle fatigue Very high cycle fatigue Failure mechanism Failure mechanism Multiaxial fatigue Multiaxial fatigue
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| GB/T 7714 | Chen, Chao -Lin , Shang, De-Guang , Xiao, Na-Min et al. Multiaxial fatigue life prediction based on effective factor with shear/axial stress ratio for Ti60 titanium alloy in very high cycle regime [J]. | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 184 . |
| MLA | Chen, Chao -Lin et al. "Multiaxial fatigue life prediction based on effective factor with shear/axial stress ratio for Ti60 titanium alloy in very high cycle regime" . | INTERNATIONAL JOURNAL OF FATIGUE 184 (2024) . |
| APA | Chen, Chao -Lin , Shang, De-Guang , Xiao, Na-Min , Li, Xing -Wu , Sha, Ai-Xue , Li, Jing et al. Multiaxial fatigue life prediction based on effective factor with shear/axial stress ratio for Ti60 titanium alloy in very high cycle regime . | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 184 . |
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Abstract ：
The power spectral density curves of the random vibration response of a plate specimen with different spectral width coefficients were obtained by selecting different frequency ranges, and the probability distributions of the stress amplitudes were obtained by applying Monte Carlo method and rainflow counting method. Each probability distribution was divided into three segments by the corresponding zero-order spectral moment value, and each segment was fitted using either a Rayleigh function or an exponential function. Finally, a probability density function of stress amplitude was proposed by combining two Rayleigh functions and an exponential function. The proposed probability density function can be used to obtain the stress amplitude probability distribution for the power spectral density curves of structural random vibration response with any bandwidth, and the accuracy of the proposed function was verified based on the response data of a specimen of 7075-T651 aluminum alloy material under the action of six typical power spectral curves.
Keyword ：
Probability density function Probability density function Monte Carlo method Monte Carlo method Power spectral density Power spectral density Broadband signal Broadband signal Random vibration Random vibration
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| GB/T 7714 | Wu, Shao-Dong , Shang, De-Guang , Shi, Feng-Tian et al. A probability density function of stress amplitude applicable to power spectral density curves of structural random vibration response [J]. | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 186 . |
| MLA | Wu, Shao-Dong et al. "A probability density function of stress amplitude applicable to power spectral density curves of structural random vibration response" . | INTERNATIONAL JOURNAL OF FATIGUE 186 (2024) . |
| APA | Wu, Shao-Dong , Shang, De-Guang , Shi, Feng-Tian , Zhao, Bo-Cheng . A probability density function of stress amplitude applicable to power spectral density curves of structural random vibration response . | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 186 . |
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Abstract ：
The fatigue performance and microstructure of polycrystalline copper treated by one (UUV1), two (UUV2), three (UUV3) passes of unconstraint ultrasonic vibration (UUV) treatment were investigated in this paper. The surface roughness, fatigue life, microstructure, and plastic strain energy before and after UUV treatment were compared. The results revealed that the surface integrity of the sample for UUV treatment higher than that of the original sample, and the microscope observation found that the grain orientation, the dislocation density, the low angle grain boundaries, the plastic strain energy of the damaged sample restored to the original state to a great extent after UUV treatment. The fatigue crack initiation life increased by 3 times after UUV3 treatment.
Keyword ：
Fatigue life Fatigue life Molecular dynamics simulation Molecular dynamics simulation LAGBs LAGBs Plastic strain energy Plastic strain energy Unconstraint ultrasonic vibration Unconstraint ultrasonic vibration
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| GB/T 7714 | Guo, Yi-Er , Shang, De-Guang , Xue, Long et al. Damage healing mechanisms in polycrystalline copper under unconstraint ultrasonic vibration treatment [J]. | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 185 . |
| MLA | Guo, Yi-Er et al. "Damage healing mechanisms in polycrystalline copper under unconstraint ultrasonic vibration treatment" . | INTERNATIONAL JOURNAL OF FATIGUE 185 (2024) . |
| APA | Guo, Yi-Er , Shang, De-Guang , Xue, Long , Yin, Xiang , Chen, Chao-Lin , Li, Dao-Hang . Damage healing mechanisms in polycrystalline copper under unconstraint ultrasonic vibration treatment . | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 185 . |
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Abstract ：
The fatigue experiments for titanium alloy Ti60 under different uniaxial/multiaxial thermo-mechanical loading modes found that the combined action of high temperature and tensile stress can cause the debonding of the second phase strengthening particles between grain boundary, reducing the ability to resist deformation of Ti60, which leads to a decrease in the fatigue life of the material. In addition, mean tensile stress increases the ability of cracks to break through intergranular barriers and the non-proportional additional hardening caused by multiaxial loading exacerbates the formation of microcracks. Both will increase the fatigue damage of the material. The fatigue damage mechanism identified in this investigation can reasonably explain the fatigue life law under multiaxial loading at high temperature, uniaxial and multiaxial thermo-mechanical fatigue loadings.
Keyword ：
Thermo-mechanical Fatigue Loading Thermo-mechanical Fatigue Loading Multiaxial Fatigue Loading Multiaxial Fatigue Loading Titanium Alloy Titanium Alloy Dislocation Dislocation High Temperature High Temperature Phase Shift Phase Shift
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| GB/T 7714 | Mao, Zheng-Yu , Shang, De-Guang , Li, Dao-Hang et al. Damage mechanisms of Ti60 under different uniaxial/multiaxial thermo-mechanical loading modes [J]. | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 191 . |
| MLA | Mao, Zheng-Yu et al. "Damage mechanisms of Ti60 under different uniaxial/multiaxial thermo-mechanical loading modes" . | INTERNATIONAL JOURNAL OF FATIGUE 191 (2024) . |
| APA | Mao, Zheng-Yu , Shang, De-Guang , Li, Dao-Hang , Xiao, Na-Min , Sha, Ai-Xue , Li, Jing-Xuan et al. Damage mechanisms of Ti60 under different uniaxial/multiaxial thermo-mechanical loading modes . | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 191 . |
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Abstract ：
For vibration response signals with mean stress, a Rayleigh function with a multiplier was used to fit the probability distribution of stress amplitude corrected to vibration response signals with zero mean stress. An equation was developed by the obtained S-N curves for welded 1Cr18Ni9Ti stainless steel connections with stress ratios of-1, 0.1, and 0.5, respectively, to convert the stress amplitudes of cyclic loadings with different mean stress to stress amplitudes with zero mean stress for the same fatigue life. Based on the S-N curve of material with a stress ratio of-1 and the Miner linear damage accumulation theory, a vibration fatigue life prediction method was proposed. The results of the random vibration fatigue test with non-zero mean stress on the pipeline of the launch vehicle have verified the accuracy of the proposed method.
Keyword ：
Life prediction Life prediction Welded structure Welded structure Rayleigh function Rayleigh function Mean stress Mean stress Vibration fatigue Vibration fatigue
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| GB/T 7714 | Wu, Shao-Dong , Shang, De-Guang , Zhou, Chang et al. Fatigue life prediction model for welded stainless steel connections considering mean stress under random vibration [J]. | ENGINEERING FRACTURE MECHANICS , 2024 , 314 . |
| MLA | Wu, Shao-Dong et al. "Fatigue life prediction model for welded stainless steel connections considering mean stress under random vibration" . | ENGINEERING FRACTURE MECHANICS 314 (2024) . |
| APA | Wu, Shao-Dong , Shang, De-Guang , Zhou, Chang , Ma, Jing-Xin , Ma, Ze-Peng , Zhao, Bo-Cheng . Fatigue life prediction model for welded stainless steel connections considering mean stress under random vibration . | ENGINEERING FRACTURE MECHANICS , 2024 , 314 . |
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Abstract ：
This paper presents a thermo-mechanical fatigue (TMF) life prediction method for titanium alloy TA15 under multiaxial random amplitude loading. Through strain-controlled TMF tests, it was found that under full-reversed cyclic loading, there was a significant presence of mean stress in the stress response. The induced mean stress led to the anomalous phenomenon where the fatigue life of thermal phase angle out-of-phase (TOP) was shorter than that of thermal phase angle in-phase (TIP). Therefore, a new damage calculation model was proposed, which can take into account the pure fatigue damage considering mean stress conversion and the cumulative environmental damage. Uniaxial TMF tests, constant amplitude multiaxial TMF tests, and random amplitude multiaxial TMF tests are conducted to verify the proposed method. The predicted results for all types of tests are in a good agreement with the experimental data.
Keyword ：
Life prediction Life prediction Multiaxial random loading Multiaxial random loading Mean stress Mean stress Thermo-mechanical fatigue Thermo-mechanical fatigue Titanium alloy Titanium alloy
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| GB/T 7714 | Wang, Jin-Jie , Shang, De-Guang , Li, Wen-Long et al. Fatigue life prediction considering conversion of mean stress for titanium alloy under multiaxial thermo-mechanical random loading [J]. | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 188 . |
| MLA | Wang, Jin-Jie et al. "Fatigue life prediction considering conversion of mean stress for titanium alloy under multiaxial thermo-mechanical random loading" . | INTERNATIONAL JOURNAL OF FATIGUE 188 (2024) . |
| APA | Wang, Jin-Jie , Shang, De-Guang , Li, Wen-Long , Li, Wei , Qian, Cheng , Wu, Shao-Dong . Fatigue life prediction considering conversion of mean stress for titanium alloy under multiaxial thermo-mechanical random loading . | INTERNATIONAL JOURNAL OF FATIGUE , 2024 , 188 . |
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Abstract ：
In this paper, the competition mechanism between protectiveness and harmfulness of oxidation, as well as the effects of cycle period, mean stress and temperature on the damage behavior of TA15 titanium alloy are revealed under multiaxial thermo-mechanical fatigue loading. Based on the damage mechanism, a high-temperature environmental damage model is proposed under multiaxial thermo-mechanical fatigue loading first, then a life prediction method is developed by combining a multiaxial fatigue damage model. The experimental verification results under uniaxial and multiaxial thermo-mechanical fatigue loadings showed that almost all of the prediction errors are within a factor of 2.
Keyword ：
Life prediction Life prediction Damage mechanism Damage mechanism Titanium alloy Titanium alloy Multiaxial thermo-mechanical fatigue Multiaxial thermo-mechanical fatigue
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| GB/T 7714 | Qian, Cheng , Shang, De-Guang , Li, Dao-Hang et al. Life prediction based on fatigue-environment damage under multiaxial thermo-mechanical loading [J]. | ENGINEERING FRACTURE MECHANICS , 2024 , 308 . |
| MLA | Qian, Cheng et al. "Life prediction based on fatigue-environment damage under multiaxial thermo-mechanical loading" . | ENGINEERING FRACTURE MECHANICS 308 (2024) . |
| APA | Qian, Cheng , Shang, De-Guang , Li, Dao-Hang , Li, Wei , Li, Wen-Long , Mao, Zheng-Yu et al. Life prediction based on fatigue-environment damage under multiaxial thermo-mechanical loading . | ENGINEERING FRACTURE MECHANICS , 2024 , 308 . |
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Abstract ：
In this paper, a fatigue-creep damage model that can take into account the interaction of fatigue and creep damage is proposed under high temperature cyclic loading. In the proposed model, the effect of temperature on creep damage, the variation of creep damage under different high temperature cyclic loading conditions, and fatigue-creep interaction damage are considered. In addition, in order to accurately describe the creep behavior of unidirectional laminates with different orientations, the damage mechanism of unidirectional laminates was also analyzed. The creep and fatigue test results at different temperatures showed that the proposed creep rupture time model and the fatigue-creep damage model considering the damage mechanisms can successfully predict the creep and fatigue lives of unidirectional laminates at high temperature, and the prediction results are in good agreement with the experimental data.
Keyword ：
Composite laminates Composite laminates Fatigue life prediction Fatigue life prediction Creep damage Creep damage Elevated temperature Elevated temperature Fatigue damage Fatigue damage
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| GB/T 7714 | Guo, Yi-Er , Shang, De-Guang , Zuo, Lin-Xuan et al. Fatigue-creep damage model for carbon fibre reinforced composites under high temperature cyclic loading [J]. | COMPOSITES SCIENCE AND TECHNOLOGY , 2024 , 258 . |
| MLA | Guo, Yi-Er et al. "Fatigue-creep damage model for carbon fibre reinforced composites under high temperature cyclic loading" . | COMPOSITES SCIENCE AND TECHNOLOGY 258 (2024) . |
| APA | Guo, Yi-Er , Shang, De-Guang , Zuo, Lin-Xuan , Qu, Lin-Feng , Chen, Chao-Lin . Fatigue-creep damage model for carbon fibre reinforced composites under high temperature cyclic loading . | COMPOSITES SCIENCE AND TECHNOLOGY , 2024 , 258 . |
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