A Fatigue Life Prediction Model Based on Modified Resolved Shear Stress for Nickel-Based Single Crystal Superalloys

Wang, Jialiang; Wei, Dasheng; Wang, Yanrong; Jiang, Xianghua

doi:10.3390/met9020180

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…Fatigue life prediction has an important impact on the design, use and maintenance of parts. [41][42][43][44] It is the key to ensuring safety. Before the life estimation of the lower arm, the fatigue life corresponding to the onedimensional load spectrum needs to be found first.…”

Section: Fatigue Life Prediction Of Lower Armmentioning

confidence: 99%

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Random fatigue life prediction of automobile lower arm via modified Corten–Dolan model

Yang

Liu

Wang

2022

Fatigue Fract Eng Mat Struct

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The fatigue life for the rear suspension lower arm of the passenger car is investigated. The road load signals collected by the sextant force measuring instrument are processed. And the frequency histogram of it is plotted and its distribution characteristics are analyzed. The load signal is extrapolated to a cumulative frequency of 10 6 using the parametric method, and the onedimensional load spectrum of the lower arm is compiled. Based on the nonlinear fatigue cumulative damage theory, Corten-Dolan model is modified by introducing the kth power of the stress ratio between two adjacent levels. The improved fatigue life prediction model is established and the validity of the model was determined by experimental data. And the improved Corten-Dolan and the linear cumulative damage model are used to predict the life of the lower arm under one-dimensional load spectrum respectively.

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Section: Fatigue Life Prediction Of Lower Armmentioning

confidence: 99%

“…Fatigue life prediction has an important impact on the design, use and maintenance of parts 41–44 . It is the key to ensuring safety.…”

Section: Fatigue Life Prediction Of Lower Armmentioning

confidence: 99%

Random fatigue life prediction of automobile lower arm via modified Corten–Dolan model

Yang

Liu

Wang

2022

Fatigue Fract Eng Mat Struct

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“…At low and medium temperatures (<870 K), plastic deformation is mainly concentrated in the actuation of the octahedral slip systems. However, both octahedral slip systems and hexahedral slip systems are activated at high temperatures (>870 K) [18]. Consequently, 30 slip systems are all considered in thermal stress simulation calculations, due to the fact that the rotor blade temperature varies from 670 to 1370 K. In this case, τ max (MRSS) is taken as the maximum resolved shear stress amplitude among a group of 30 resolved shear stress amplitudes at every node.…”

Section: Dominant Slip Systemsmentioning

confidence: 99%

“…Staroselsky et al [17] used the coupled methodology of computational fluid dynamics (CFD) and the thermal-structural finite element model (FEM) with a slip-based constitutive model to predict the life of realistic turbine airfoils under nonhomogeneous transient temperature. Wang et al [18] proposed a fatigue life prediction model for nickel-based single-crystal blade on the basis of the resolved shear stress amplitude. The model has excellent application prospects by using the maximum resolved shear stress of the primary octahedral slip system as the damage parameter at a lower temperature.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Conjugated Heat Transfer and Thermal Stress Distributions in a High-Temperature Ni-Based Superalloy Turbine Rotor Blade

et al. 2022

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This paper establishes a multidisciplinary method combining conjugate heat transfer (CHT) and thermal stress for a high-temperature Ni-based superalloy turbine rotor blade with integrated cooling structures. A conjugate calculation is performed to investigate the coolant flow characteristics, heat transfer, and thermal stress of the rotor blade under rotating and stationary conditions to understand the effects of rotation on the multidisciplinary design of the blade. Furthermore, the maximum resolved shear stress among the 30-slip systems and the corresponding dominant slip system are obtained to predict the deformation tendency of the blade by employing the crystal plasticity finite element method (CPFEM) and considering the specified anisotropic blade material (GTD-111). The results show that the forces of rotation, including centrifugal and Coriolis forces, and their induced buoyancy force, alter the coolant flow field and thus affect the rotor blade’s heat transfer distribution compared with the stationary condition. The maximum temperature and thermal stress of the rotor blade under rotating conditions are reduced by 5% and 21% compared with that under the stationary condition, respectively. Compared with the stationary condition, the temperature and thermal stress distribution on the blade under the rotating condition are more uniform, especially on the suction side. In addition, the blade root connecting with the hub, the film holes near the leading-edge region at the blade root, the mid-chord of the suction surface, and the grooved blade tip are easily damaged by the enormous resolved shear stress and the interface effect of different types of dominant slip system under the two conditions. In this work, it was feasible to use the cascade cooling effect test to analyze the dynamic test results for the rotor blade. Furthermore, the thermal stress analysis based on the CPFEM can provide a superior level of blade cooling design than CHT by considering the anisotropic material characteristics of a turbine blade.

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“…There is a tendency to modify such models in order to extend their scope of operation. This has resulted in the development or modification of many models over the last few decades [10][11][12][13][14][15][16]. Functions that reduce the fluctuation of multiaxial stress states to an equivalent scalar value are an integral part of fatigue models.…”

Section: Introductionmentioning

confidence: 99%

Application of Life-Dependent Material Parameters to Fatigue Life Prediction under Multiaxial and Non-Zero Mean Loading

2020

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This study presents the life-dependent material parameters concept as applied to several well-known fatigue models for the purpose of life prediction under multiaxial and non-zero mean loading. The necessity of replacing the fixed material parameters with life-dependent parameters is demonstrated. The aim of the research here is verification of the life-dependent material parameters concept when applied to multiaxial fatigue loading with non-zero mean stress. The verification is performed with new experimental fatigue test results on a 7075-T651 aluminium alloy and S355 steel subjected to multiaxial cyclic bending and torsion loading under stress ratios equal to R = −0.5 and 0.0, respectively. The received results exhibit the significant effect of the non-zero mean value of shear stress on the fatigue life of S355 steel. The prediction of fatigue life was improved when using the life-dependent material parameters compared to the fixed material parameters.

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A Fatigue Life Prediction Model Based on Modified Resolved Shear Stress for Nickel-Based Single Crystal Superalloys

Cited by 8 publications

References 24 publications

Random fatigue life prediction of automobile lower arm via modified Corten–Dolan model

Random fatigue life prediction of automobile lower arm via modified Corten–Dolan model

Numerical Analysis of Conjugated Heat Transfer and Thermal Stress Distributions in a High-Temperature Ni-Based Superalloy Turbine Rotor Blade

Application of Life-Dependent Material Parameters to Fatigue Life Prediction under Multiaxial and Non-Zero Mean Loading

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