Cyclic Creep Damage in Thin-Walled Structures

Altenbach, H; Breslavsky, Dmytro; Morachkovsky, Oleg; Naumenko, Konstantin

doi:10.1243/0309324001513964

Cited by 11 publications

(24 citation statements)

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“…Simulations of components in inelastic range for many cycles of loading is time consuming, if ever possible. For an efficient analysis it is convenient to introduce two or more time scales Altenbach et al (2000a);Devulder et al (2010);Fish et al (2012). A "slow or macroscopic" time scale can be used to capture the global cyclic behavior like cyclic hardening, softening or creep ratcheting.…”

Section: Temporal Scale Effectsmentioning

confidence: 99%

“…Examples are theories of rods, plates shells and three-dimensional solids as well as direct variational methods, e.g. Altenbach et al (1998);Betten (2005); Boyle and Spence (1983); Hyde et al (2013);Malinin (1981); Podgorny et al (1984); Skrzypek (1993). Numerical solution techniques, for example the finite element method can be combined with various time step integration techniques to simulate time dependent structural behavior up to critical state of failure.…”

Section: Modeling Approachesmentioning

confidence: 99%

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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: Temporal Scale Effectsmentioning

confidence: 99%

Section: Modeling Approachesmentioning

confidence: 99%

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Naumenko

Altenbach

2015

Advanced Structured Materials

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“…One feature of (3.1.13) is the use of a hyperbolic function for the dependence of the minimum creep rate on the stress instead of the power function in (3.1.11). In [8,33] we utilized the models (3.1.11) and (3.1.13) for the structural analysis of pressurized cylindrical shells and transversely loaded rectangular plates. For this purpose we assume ω 1 in (3.1.11) leading to the Norton-Bailey creep equationε cr min = aσ n .…”

Section: Aluminium Alloy Bs 1472mentioning

confidence: 99%

Modeling of Creep for Structural Analysis

Naumenko

Altenbach

2007

Foundations of Engineering Mechanics

149

109

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“…The increase in the creep rate in the tertiary stage due to changes in the microstructure is referred to as the formation of creep damage [1][2][3]. There are a number of creep damage mechanisms including particle coarsening, subgrain growth, cavitation and recovery of the dislocation structure, which can all accelerate the creep rate during tertiary creep.…”

Section: Introductionmentioning

confidence: 99%

Basic modelling of tertiary creep of copper

Sui

Sandström

2018

J Mater Sci

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Mechanisms that are associated with acceleration of the creep rate in the tertiary stage such as microstructure degradation, cavitation, necking instability and recovery have been known for a long time. Numerous empirical models for tertiary creep exist in the literature, not least to describe the development of creep damage, which is vital for understanding creep rupture. Unfortunately, these models almost invariably involve parameters that are not accurately known and have to be fitted to experimental data. Basic models that take all the relevant mechanisms into account which makes them predictive have been missing. Only recently, quantitative basic models have been developed for the recovery of the dislocation structure during tertiary creep and for the formation and growth of creep cavities. These models are employed in the present paper to compute the creep strain versus time curves for copper including tertiary creep without the use of any adjustable parameters. A satisfactory representation of observed tertiary creep has been achieved. In addition, the role of necking is analysed with both uniaxial and multiaxial methods.

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Cyclic Creep Damage in Thin-Walled Structures

Cited by 11 publications

References 0 publications

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Modeling of Creep for Structural Analysis

Basic modelling of tertiary creep of copper

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