A flow stress for the deformation under varying condition—internal and state variable models

Svyetlichnyy, Dmytro; Majta, Janusz; Nowak, J.

doi:10.1016/j.msea.2013.04.007

Cited by 15 publications

(18 citation statements)

References 27 publications

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“…The first one is an internal variable model [16] based on dislocation theory and describing the mechanical behavior of f.c.c. polycrystalline structures.…”

Section: Flow Stress Modelsmentioning

confidence: 99%

“…The model [16] is based on Taylor's dislocation theory [17]. In the model, the following equation describes the flow stress as a function of the general internal variable ρ av :…”

Section: Internal Variable Modelmentioning

confidence: 99%

“…Equation (3) is discussed in detail elsewhere [16]. Factor k ρ is responsible for implementation into the model the real deformation conditions.…”

Section: Internal Variable Modelmentioning

confidence: 99%

“…The model demonstrates exceptional ability for a proper description evolution of the dislocation density not only during the deformation but also after it. Later, Svyetlichnyy et al [16] extend the multiplicative model on varying deformation conditions. In the paper [16], the results of experimental studies and theoretical analysis clearly show that the rheological model should be multiplicative.…”

Section: Introductionmentioning

confidence: 99%

“…Later, Svyetlichnyy et al [16] extend the multiplicative model on varying deformation conditions. In the paper [16], the results of experimental studies and theoretical analysis clearly show that the rheological model should be multiplicative. It is more important than the choice between one or more internal variable.…”

Section: Introductionmentioning

confidence: 99%

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Flow stress models for deformation under varying condition—finite element method simulation

Svyetlichnyy

Nowak

Biba³

et al. 2016

Int J Adv Manuf Technol

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This work presents description and comparison of internal and state variable models of flow stress in varying processing conditions. Three models were analyzed. The first one is based on dislocation theory and describing the mechanical behavior of f.c.c. polycrystalline structures. The second and third models are standard and modified Sellars' flow stress models. Models were adapted for two commercial codes based on finite element method: QForm7 and Forge 2005. The compression test of 45 grade steel with instant changes of strain rate was simulated. Calculated compression force and flow stress were compared with the experimental data from plastometric tests. The forging process was simulated by QForm7. Results obtained by both internal and modified Sellars' models confirm their high accuracy for analysis and prediction of the flow stress under the varying deformation conditions.

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“…The first one is an internal variable model [16] based on dislocation theory and describing the mechanical behavior of f.c.c. polycrystalline structures.…”

Section: Flow Stress Modelsmentioning

confidence: 99%

“…The model [16] is based on Taylor's dislocation theory [17]. In the model, the following equation describes the flow stress as a function of the general internal variable ρ av :…”

Section: Internal Variable Modelmentioning

confidence: 99%

“…Equation (3) is discussed in detail elsewhere [16]. Factor k ρ is responsible for implementation into the model the real deformation conditions.…”

Section: Internal Variable Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations