Multi-axial thermo-mechanical analysis of power plant components from 9–12% Cr steels at high temperature

Naumenko, Konstantin; Kutschke, Andreas; Kostenko, Yevgen; Rudolf, Thorsten

doi:10.1016/j.engfracmech.2010.12.002

Cited by 45 publications

(27 citation statements)

References 13 publications

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“…In tests with high temperature differences, the extent of surface oxidation and Fig. 12.14 Loading profiles and stress response for one cycle of TMF loading, after Naumenko et al (2011b) spallation was high due to the high thermal transient and the rate of metal removal at the surface appeared to be greater than the rate of crack development.…”

Section: Low Cyclementioning

confidence: 96%

“…12.3.2 for a two-bar system are typical for many components subjected to variable thermal environment. Examples include turbine rotors (Naumenko et al 2011b;Kostenko et al 2013;Holdsworth et al 2007;Colombo et al 2008), turbocharger casings (Laengler et al 2010;Nagode et al 2011;Längler et al 2014) and many other structures.…”

Section: Two-bar System Under Thermo-mechanical Loadingmentioning

confidence: 98%

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Analysis of Inelastic Behavior for High Temperature Materials and Structures

Naumenko

Altenbach

2015

Advanced Structured Materials

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This review provides a current status in modeling and analysis of structures for high-temperature applications. Basic features of inelastic behavior of heat resistant alloys are discussed. Typical responses for stationary and varying loading and temperature are presented and classified. Microstructural features and microstructural changes in the course of inelastic deformation at high temperature are discussed. The state of the art on material modeling and structural analysis in the inelastic range at high temperature is resented.Keywords Creep · Low cycle fatigue · Damage mechanics · Length scales · Temporal scales · Structural analysis IntroductionThe aim of this contribution is to give an overview of experimental and theoretical approaches to analyze the behavior of materials and structures subjected to mechanical loading and "high-temperature" environment. The definition of "hightemperature" materials and "high-temperature" structures can be related to the value of the homologous temperature, that is T /T m , where T is the absolute temperature and T m is the melting point of the considered material. Materials that can be efficiently used within the temperature range 0.3 < T /T m < 0.7 are called hightemperature materials. Examples include heat resistant steels, nickel-bases alloys, age-hardened aluminum alloys, cast iron materials and metal matrix composites. Structures that operate in the temperature range 0.3 < T /T m < 0.7 over a long period of time are called high-temperature structures. Examples include turbine

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Section: Low Cyclementioning

confidence: 96%

Section: Two-bar System Under Thermo-mechanical Loadingmentioning

confidence: 98%

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Naumenko

Altenbach

2015

Advanced Structured Materials

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“…In this context, the previous stress‐based model proposed by Hayhurst and ductility‐based models proposed by Cocks and Ashby and Bendick were used. Generally, in the classical and modern models, the effects of multiaxial states of stress on the creep damage accumulation and growth are considered …”

Section: Introductionmentioning

confidence: 99%

“…Generally, in the classical and modern models, the effects of multiaxial states of stress on the creep damage accumulation and growth are considered. 7,8,[10][11][12][13][14] Hutchinson 4 proposed a multiaxial constitutive law for creep strain rate, which is based on the micromechanical considerations. Subsequently, for a structural material undergoing grain boundary cavitation, a potential function initially introduced by Hutchinson 4 was summarized by Bassani and Hawk 15 in a general form, which includes many of the previously proposed creep damage equations.…”

Section: Introductionmentioning

confidence: 99%

Creep‐fracture resistance parameters determination based on stress and ductility damage models

Shlyannikov

Tumanov

2018

Fatigue Fract Eng Mat Struct

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The stress, strain rate, and process zone with respect to the creep‐crack growth in pure modes I and II are analysed by using damage‐evolution equations. The damage models for the fracture of the process zone are represented using a stress‐ and ductility‐based formulation. According to the stress‐based model, 2 expressions are proposed to describe the stress‐sensitive nature of a multiaxial rupture behaviour. Following the ductility model, new multiaxial failure strain conditions are derived. Both damage‐free and defective creeping solids have been studied. The variations in the creep stress or strain and crack‐tip governing parameter in terms of the creep In‐integral with respect to time and the evolution of creep damage are analysed using a finite element model. The effect of the introduced creep stress intensity factor as a function of the creep time, loading biaxiality, and creep damage models is discussed in detail.

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“…The effect of the process-induced anisotropy is less evident in the case of strain-controlled loading, but, nevertheless, it still has to be accounted for (cf. [30,40,48]). Let us briefly discuss the main phenomenological approaches to cyclic creep.…”

Section: Introductionmentioning

confidence: 99%

Modelling of cyclic creep in the finite strain range using a nested split of the deformation gradient

Shutov

Larichkin

Shutov

2017

Z. Angew. Math. Mech.

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A new phenomenological model of cyclic creep, which is suitable for applications involving finite creep deformations of the material, is proposed. The model accounts for the effect of the transient increase of the creep strain rate upon the load reversal. In order to extend the applicability range of the model, the creep process is fully coupled to the classical Kachanov-Rabotnov damage evolution. As a result, the proposed model describes all the three stages of creep. Large strain kinematics is described in a geometrically exact manner using the assumption of a nested multiplicative split, originally proposed by Lion for finite strain plasticity. The model is thermodynamically admissible, objective, and w-invariant. The implicit time integration of the proposed evolution equations is discussed. The corresponding numerical algorithm is implemented into the commercial FEM code MSC.Marc. The model is validated using this code; the validation is based on real experimental data on cyclic torsion of a thick-walled tubular specimen made of the D16T aluminium alloy. The numerically computed stress distribution exhibits a "skeletal point" within the specimen, which simplifies the analysis of test data.

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Multi-axial thermo-mechanical analysis of power plant components from 9–12% Cr steels at high temperature

Cited by 45 publications

References 13 publications

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Creep‐fracture resistance parameters determination based on stress and ductility damage models

Modelling of cyclic creep in the finite strain range using a nested split of the deformation gradient

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