Surface stability in stress-assisted corrosion: a peridynamic investigation

Fan, Shuaiqi; Tian, Chenwen; Liu, Yunpeng; Chen, Ziguang

doi:10.1016/j.electacta.2022.140570

Cited by 8 publications

(9 citation statements)

References 49 publications

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“…In this case, the corrosion process is similar to uniform corrosion without stress, and the rough surface will become flatter during the dissolution process. This phenomenon was also reported by Fan's work [30] and Li's experiment [10]. But the applied stress still has an effect on corrosion rate; the steady state of the flattening pattern cannot reach absolute flatness unless 0…”

Section: Flattening Patternsupporting

confidence: 74%

“…For an undulated surface, the crevice is bound to occur as long as the applied stress exceeds a critical value crevice A  . As a consequence, the surface will undergo the unstable evolution once the crevice is formed when applied stress exceeds crevice A  , which was also reported by Fan's work [30] . This result matches well with Kamaya's experiments [44,45].…”

Section: Repeatsupporting

confidence: 67%

“…Thus, two parameters: surface roughness and the stress concentration factor, were used to differentiate them. As surface morphology evolves due to stress-assisted corrosion, the surface roughness a R and the stress concentration factor (SCF) T K change simultaneously [10,30,41]. Both where * m y is the vertical coordinate of the midcourt line of the surface profile.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…Apart from experiments, numerical methods have been developed to simulate the evolution process of corrosion morphology and provide insights for further research [30]. Jafarzadeh et al simulated the evolution process of crevice corrosion damage in Nickel alloy 625 using the peridynamic method, which matched well with the experimental results [31].…”

Section: Introductionmentioning

confidence: 92%

“…Duddu et al developed a new extended finite element method to track the evolution process of corrosion pits and crevices [32]. Fan et al simulated the evolution process of corrosion morphology under different mechanical loads and reported that stress had a great influence on corrosion morphology [30]. An initial sine wave surface was corroded into pits and crevices with mechanical loading; the surface became flatter and smoother via uniform corrosion under no stress [30].…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Induced Morphology Evolution in Stressed Solids

Dong

Zhang

et al. 2023

Metals

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Corrosion morphology is a key factor that influences the reliability and service life of a structure. As most structures service under stress corrosion, there is a great need to understand the effect of stress on the formation conditions of different morphologies. This paper introduces a numerical method to simulate the evolution of surface morphologies. The results indicate that a corroded surface will become rougher and sharper with an increase in stress, and as a consequence, the corrosion morphology will transfer from a flatter surface to a pit and then a crevice. The critical stress values for different morphologies (crevice, pit, and a flatter surface) were captured. Among the three morphologies, the flatter surface and pit maintain a fixed shape, also known as stable morphology. As stress exceeds a critical value, crevices are generated, and the morphology evolution becomes unstable. On the basis of the simulation results, the influence of morphology on the service life of the structure was evaluated. The corrosion velocity of a rough surface exceeds that of a flat surface, and this reduces the service life of the structure more significantly. With a rise in applied stress, the acceleration of corrosion presents a quadratically increasing relationship with applied stress.

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Section: Flattening Patternsupporting

confidence: 74%

Section: Repeatsupporting

confidence: 67%

Section: Simulation Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Corrosion Induced Morphology Evolution in Stressed Solids

Dong

Zhang

et al. 2023

Metals

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Element‐based coupling modeling of peridynamics and classical continuum mechanics for dynamic brittle fracture

Yu,

Han,

et al. 2023

Numerical Meth Engineering

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In this work, the hybrid peridynamic and classical continuum mechanical model based on the element‐type numerical discretization is used to study the dynamic fracture problem of brittle materials. The weak form of the motion equation for the hybrid model is derived by applying Hamilton's principle. An element‐based spatial discretization scheme is set up using the peridynamics‐based finite element method (PeriFEM) (Han and Li). The ‐convergence and m‐convergence of the hybrid model are analyzed to verify the numerical convergence and the mesh dependency. The influence of the area of the peridynamic model subdomain and the hybrid model subdomain on the calculation efficiency and accuracy is discussed. And the relationship between the crack propagation speed and the crack branching phenomenon is also investigated. Good agreements are obtained by comparing the crack path and the crack speed profile predicted by the hybrid model with those in the literature. Numerical results verify the ability and efficiency of the hybrid model for dynamic fracture problem.

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Electro-chemo-mechanical phase field modeling of localized corrosion: theory and COMSOL implementation

Cui

Martínez‐Pañeda

2023

Engineering with Computers

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A new theoretical phase field-based formulation for predicting electro-chemo-mechanical corrosion in metals is presented. The model combines electrolyte and interface electrochemical behaviour with a phase field description of mechanically-assisted corrosion accounting for film rupture, dissolution and repassivation. The theoretical framework is numerically implemented in the finite element package COMSOL MULTIPHYSICS and the resulting model is made freely available. Several numerical experiments are conducted showing that the corrosion predictions by the model naturally capture the influence of varying electrostatic potential and electrolyte concentrations, as well as predicting the sensitivity to the pit geometry and the strength of the passivation film.

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Surface stability in stress-assisted corrosion: a peridynamic investigation

Cited by 8 publications

References 49 publications

Corrosion Induced Morphology Evolution in Stressed Solids

Corrosion Induced Morphology Evolution in Stressed Solids

Element‐based coupling modeling of peridynamics and classical continuum mechanics for dynamic brittle fracture

Electro-chemo-mechanical phase field modeling of localized corrosion: theory and COMSOL implementation

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