Ratchetting strain as a damage parameter in controlling crack growth at elevated temperature

Cornet, C.; Li, Zhao; Tong, Jie

doi:10.1016/j.engfracmech.2009.09.005

Cited by 22 publications

(29 citation statements)

References 48 publications

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“…and one cubic slip system (100) [0][1][2][3][4][5][6][7][8][9][10][11]. The 2D in-plane traces of these four slip systems are shown in Fig.15a, and the accumulated shear strain are plotted in Fig.15b for each slip system.…”

Section: Shear Deformation Along Slip Planes Near the Crack Tipmentioning

confidence: 99%

“…By changing the orientation of the crack-tip grain to that for grain 1' and 1'', as shown in the inverse pole figure in Fig.4, crack growth will then follow the trace for the octahedral slip system (-1-11) [-110] and the cubic slip system (111) [1][2][3][4][5][6][7][8][9][10], respectively, which happen to have the maximum amount of accumulated slip (see Fig.16). …”

Section: Shear Deformation Along Slip Planes Near the Crack Tipmentioning

confidence: 99%

“…It turns out that four slip systems appear to have the most notable amount of shear deformation accumulated in four cycles, which include three octahedral slip systems (111) [1][2][3][4][5][6][7][8][9][10], (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)[-101] and (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)[110]…”

Section: Shear Deformation Along Slip Planes Near the Crack Tipmentioning

confidence: 99%

“…The area integrals in (8) and (9) were computed using the Gauss integration algorithm as used in ABAQUS. A post-processing program was written in Fortran to obtain the stress and strain values for all the FE integration points and then perform the Gauss integration to work out the global stress and strain response.…”

Section: X-direction Displacements For Nodes a And C; V(a) And V(b) Amentioning

confidence: 99%

“…Constitutive, fatigue and creep behaviour of RR1000 at high temperature have been systematically studied at Portsmouth, and the data and the models are already available for validation of the material for turbine discs [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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A crystal plasticity study of cyclic constitutive behaviour, crack-tip deformation and crack-growth path for a polycrystalline nickel-based superalloy

Lin

Tong

2011

Engineering Fracture Mechanics

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Crystal plasticity has been applied to model the cyclic constitutive behaviour of a polycrystalline nickel-based superalloy at elevated temperature using finite element analyses.A representative volume element, consisting of randomly oriented grains, was considered for the finite element analyses under periodic boundary constraints. Strain-controlled cyclic test data at 650°C were used to determine the model parameters from a fitting process, where three loading rates were considered. Model simulations are in good agreement with the experimental results for stress-strain loops, cyclic hardening behaviour and stress relaxation behaviour. Stress and strain distributions within the representative volume element are of heterogeneous nature due to the orientation mismatch between neighboring grains. Stress concentrations tend to occur within "hard" grains while strain concentrations tend to locate within "soft" grains, depending on the orientation of grains with respect to the loading direction. The model was further applied to study the near-tip deformation of a transgranular crack in a compact tension specimen using a submodelling technique. Grain microstructure is shown to have an influence on the von Mises stress distribution near the crack tip, and the gain texture heterogeneity disturbs the well-known butterfly shape obtained from the viscoplasticity analysis at continuum level. The stress-strain response near the crack tip, as well as the accumulated shear deformation along slip system, is influenced by the orientation of the grain at the crack tip, which might dictate the subsequent crack growth through grains.Individual slip systems near the crack tip tend to have different amounts of accumulated shear deformation, which was utilised as a criterion to predict the crack growth path.

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Section: Shear Deformation Along Slip Planes Near the Crack Tipmentioning

confidence: 99%

Section: Shear Deformation Along Slip Planes Near the Crack Tipmentioning

confidence: 99%

Section: Shear Deformation Along Slip Planes Near the Crack Tipmentioning

confidence: 99%

Section: X-direction Displacements For Nodes a And C; V(a) And V(b) Amentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A crystal plasticity study of cyclic constitutive behaviour, crack-tip deformation and crack-growth path for a polycrystalline nickel-based superalloy

Lin

Tong

2011

Engineering Fracture Mechanics

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In Situ Experimental Study of Near-Tip Strain Evolution of Fatigue Cracks

Lupton

Zhu

et al. 2015

Exp Mech

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Near crack tip strain fields in a stationary and a growing fatigue crack have been studied in situ using the Digital Image Correlation (DIC) technique in a compact tension specimen of stainless steel 316 L under tensiontension cyclic loading. The evolution of near-tip strains normal to the crack plane was monitored at selected locations ahead of the crack tip in consecutive cycles during fatigue crack growth experiments. A stationary crack was examined first to provide a baseline reference whilst the evolution of the strain field ahead of a growing crack was monitored in situ at peak loads during fatigue cycling. The results show that strain accumulation with loading cycle occurred at all tracked locations in both cases, and it is particularly evident close to the crack tip. Moreover, a higher strain accumulation rate was found near the growing crack tip than that near the stationary crack tip. The results on near-tip strain evolution were collected for the first time in situ during the fatigue crack growth experiments, which may hopefully inform a physical-based modelling strategy of fatigue crack growth.

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Effects of Loading Frequency, Mean Stress and Stress Amplitude on Ratchetting-Fatigue Behavior in 42CrMo Steel Under Near-Yield Stress-Controlled Condition

Sui,

Wang,

Jiang

et al. 2023

Metall Mater Trans A

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Ratchetting strain as a damage parameter in controlling crack growth at elevated temperature

Cited by 22 publications

References 48 publications

A crystal plasticity study of cyclic constitutive behaviour, crack-tip deformation and crack-growth path for a polycrystalline nickel-based superalloy

A crystal plasticity study of cyclic constitutive behaviour, crack-tip deformation and crack-growth path for a polycrystalline nickel-based superalloy

In Situ Experimental Study of Near-Tip Strain Evolution of Fatigue Cracks

Effects of Loading Frequency, Mean Stress and Stress Amplitude on Ratchetting-Fatigue Behavior in 42CrMo Steel Under Near-Yield Stress-Controlled Condition

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