Steady-State Creep of a Composite Rod in Tension in the Presence of an Aggressive Environment

Fomin, L. V.

doi:10.1007/s11029-017-9624-5

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…To analyze the process of diffusion of the active medium into the material, an approximate method is proposed for solving the diffusion equation based on the introduction of a diffusion front propagating from the surface of a plate or shell (hereinafter, the plate and the shell are designated as a typical element) [2,5,6]. This approach allows one to divide the entire cross section of a typical element into perturbed (where the medium has already penetrated into the material) and unperturbed regions (where there is no penetration of the medium yet) and then track the movement of the boundary between these regions in time.…”

Section: Diffusion Of An Active Medium An Approximate Methods For Solving the Diffusion Equationmentioning

confidence: 99%

“…The influence of the active medium can be determined both by the diffusion penetration of its elements into the material, and by the corrosive effect, which is inherent in active chemical processes of interaction of working and / or environment with materials of structural elements. Of particular importance is the study of such processes during high-temperature longterm loading of metallic materials and structures under creep conditions [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Simulation of Long-Term Destruction of Typical Structural Elements Influenced By an Active Medium and Unsteady Loading

Fomin¹,

Fomina²

2021

World Congress on Mechanical, Chemical, and Material Engineering

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The long-term destruction of the shell and plate during creep in the active medium under the conditions of an unsteady complex stress state is investigated. The diffusion process of penetration of the active medium into the material is considered. The influence of the medium on the time to fracture is taken into account by introducing a function of the integral average concentration of the medium into the constitutive and kinetic linear fractional relationships. Comparison of the times to failure using the scalar and vector damage parameters is carried out. The features of using a linear fractional model to describe long-term fracture processes are determined.

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Section: Diffusion Of An Active Medium An Approximate Methods For Solving the Diffusion Equationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation of Long-Term Destruction of Typical Structural Elements Influenced By an Active Medium and Unsteady Loading

Fomin¹,

Fomina²

2021

World Congress on Mechanical, Chemical, and Material Engineering

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“…(19) implies that additional introduction of the second kinetic parameter q 2 according to (18) leads to a higher creep rate increase after the instantaneous loading compared with the standard hardening theory (12). In case of a step load, it follows from kinetic equation (18) that the parameter q 2 does not change.…”

Section: Kinetic Theory 54mentioning

confidence: 99%

“…In this section, the influence of an aggressive medium on the creep and the long-term strength of materials and structural elements are considered [6,7,[15][16][17][18]. This influence is determined by the diffusion penetration of the medium elements into the material reducing the duration of operability.…”

mentioning

confidence: 99%

Kinetic Theory of Creep and Long-Term Strength of Metals

Локощенко¹,

Fomin²

2018

Kinetic Theory

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This chapter deals with the simulation of the creep process and the effect of long-term strength of metals, notably, in both uniaxial and complex stress states. A description of a creep experiment and the simplest creep models are presented, that is, the theory of steady creep, the theory of ageing, the theory of flow and the theory of hardening. In creep process simulation, a kinetic theory based on the introduction of structural parameters characterising the state of the metal at a given time is widely used. Among such parameters, metal damage in the creep process, work of stresses on creep deformations (energy version) and concentration of an aggressive medium in the metal were studied. The coupled problem of creep and long tensile strength is also considered taking into account the mutual influence of damage accumulation and one-dimensional diffusion of the aggressive medium. The times to fracture are determined both in the presence of an aggressive medium and in the absence of one. A significant contribution of Soviet (Russian), European, American and Japanese scientists to the development of continuum damage mechanics is highlighted.

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Problem Statement Options for the Problem of the Corrosion Processes Influence on the Delayed Fracture of the Rod Under Creep Conditions

Fomin

2020

Multiscale Solid Mechanics

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Steady-State Creep of a Composite Rod in Tension in the Presence of an Aggressive Environment

Cited by 5 publications

References 1 publication

Simulation of Long-Term Destruction of Typical Structural Elements Influenced By an Active Medium and Unsteady Loading

Simulation of Long-Term Destruction of Typical Structural Elements Influenced By an Active Medium and Unsteady Loading

Kinetic Theory of Creep and Long-Term Strength of Metals

Problem Statement Options for the Problem of the Corrosion Processes Influence on the Delayed Fracture of the Rod Under Creep Conditions

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