Constitutive creep–fatigue crack growth methodology in two steels using a strip yield model

Andrews, B. J.; Potirniche, G. P.

doi:10.1016/j.engfracmech.2015.03.042

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…Therefore, the Laves phases at the crack tip can grow rapidly, which will further decrease the pinning effect of them. Besides, the results of microstructural evolution can be utilized in microstructure‐based constitutive damage model, which can consider the evolution of dislocations, precipitate coarsening, void nucleation, and solid solution depletion at the same time. The evolution of martensitic laths' width can also be considered as a damage factor to provide a more accurate description of the constitutive behaviour, which requires much more microstructural observations and modelling.…”

Section: Resultsmentioning

confidence: 99%

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

Tang

Jing

Zhao

et al. 2019

Fatigue Fract Eng Mat Struct

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Many components operate under creep‐fatigue loading causing an increasing need to learn the knowledge about creep‐fatigue crack growth (CFCG). The stress and microstructural evolution around the crack tip of G115 steel after CFCG were investigated. According to the finite element simulations, the variations of equivalent stress and stress triaxiality in the crack tip zone are presented. Furthermore, the evolutions of martensitic laths, dislocations, and precipitates were systematically studied through electron backscatter diffraction and transmission electron microscopy observations. The laths at the crack tip or under a larger hold time are wider than those remote from the crack tip or under a shorter dwell time. Meanwhile, the dislocation densities reduced significantly at the crack tip or under a larger hold time. The different variations of laths' width and dislocation densities resulted from the different stress triaxiality and creep strain. W‐rich Laves and Cu‐rich phases appeared during CFCG. The Laves phase coarsened rapidly because of the stress‐accelerated diffusion.

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Section: Resultsmentioning

confidence: 99%

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

Tang

Jing

Zhao

et al. 2019

Fatigue Fract Eng Mat Struct

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“…Based on a strip-yield methodology a new creep-fatigue crack extension model has been presented. Comparison to experimental data for a range of materials, temperatures and stresses shows its capabilities and limitations (Andrews & Potirniche, 2015).…”

Section: Mean-and Residual Stressmentioning

confidence: 99%

Report of Committee III.2: Fatigue and fracture

2015

Ships and Offshore Structures XIX

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“…Zhao et al (2020)studied the creep deformation characteristics of red sandstone under multi-stage loading and unloading conditions. Studies on rock constitutive creep models mainly include empirical model theory, element combination model theory, and damage model theory (Gray et al 2015;Andrews et al 2015;Shan et al 2021;Wu et al 2018). Cao et al (2020) obtained the creep rate versus time by introducing time-hardening and damage evolution theories and constructed a unified creep model that can describe rock creep's strong and weak creep behavior with a simple form and easy-to-find parameters.…”

Section: Introductionmentioning

confidence: 99%

A creep damage model for yellow sandstone under the action of wetting-drying cycles

Qin

Liu

Pang

et al. 2023

Mech Time-Depend Mater

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This study performs uniaxial compression and step loading and unloading creep tests on rock samples under different wetting-drying cycles with yellow sandstone to investigate the creep characteristics of rock bodies after excavation or excavations with step loading and unloading under external forces. Moreover, it constructs a creep damage model based on the nonlinear rheological theory and damage mechanics to describe the instantaneous elastic strain, instantaneous plastic strain, nonlinear viscoelastic strain, and nonlinear viscoplastic strain of rocks. Besides, it proposes a creep model parameter identification method based on the creep curve characteristics. The results have shown that the action of wetting-drying cycles causes a weakened decrease in elastic modulus, uniaxial compressive strength, and long-term compressive strength of yellow sandstone, in line with the exponential function change relationship. The specimen damage type evolves from shear damage of a single oblique section to conical shear damage of a double oblique section. Additionally, the creep rate is not constant in the steady-state creep stage but constantly changes with time, and the fluctuation range increases with the increase in the wetting-drying cycles. The creep damage model parameters Eme, Emp, Eve, and ηve do not differ much under the same stress condition, and each parameter is influenced by the creep stress σ at a specific law. The Eme, Emp, and σ have a linear relationship, whereas the Eve, ηve, and σ have an exponential one.

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Constitutive creep–fatigue crack growth methodology in two steels using a strip yield model

Cited by 10 publications

References 25 publications

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

Stress state and stress‐induced microstructural evolution around the crack tip of G115 steel after dwell‐fatigue crack propagation

Report of Committee III.2: Fatigue and fracture

A creep damage model for yellow sandstone under the action of wetting-drying cycles

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