Phenomenological Modelling of Cyclic Plasticity

Halama, Radim; Sedlák, Josef; Šofer, Michal

doi:10.5772/35902

Cited by 41 publications

(43 citation statements)

References 26 publications

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“…29 The parameter η i influences ratcheting when it equals zero no ratcheting can occur. Within a giving number of cycles η i will tend to zero and a stable hysteresis loop will form.…”

Section: Iiic2 Chaboche Modelmentioning

confidence: 99%

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Characterizing the Role of Plasticity in Structural Response to High Speed Flows

Gogulapati

LaFontaine

McNamara

2014

55th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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This paper discusses the development of a framework for characterizing the role of plasticity in the structural response of panels in high speed flows. The framework is developed around a commercial nonlinear finite element solver by incorporating CFD surrogates, for the coupled aerothermodynamic loads, in the form of user defined functions. This approach conveniently enables the study of complex built-up structural models, and the incorporation of advanced constitutive modules. The general features of the framework are provided. Also, a preliminary demonstration is carried out on the potential effect of plasticity on the fluid-thermal-structural response of a simple panel subject to both shock-impingements and severe acoustic loading over multiple loading cycles.

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“…29 The parameter η i influences ratcheting when it equals zero no ratcheting can occur. Within a giving number of cycles η i will tend to zero and a stable hysteresis loop will form.…”

Section: Iiic2 Chaboche Modelmentioning

confidence: 99%

“…Within a giving number of cycles η i will tend to zero and a stable hysteresis loop will form. 29 The isotropic hardening behavior of the model is defined by the exponential law;…”

Section: Iiic2 Chaboche Modelmentioning

confidence: 99%

Characterizing the Role of Plasticity in Structural Response to High Speed Flows

Gogulapati

LaFontaine

McNamara

2014

55th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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Section: Numerical Studymentioning

confidence: 99%

“…The modeling of material considering only the isotropic hardening law does not truly represent the nonlinear cyclic behavior of braces . The reduction in the yield stress, which is known as the Bauschinger effect, is not assimilated in the isotropic hardening models . Therefore, a combined isotropic and kinematic hardening model has been considered in this simulation study to reflect the effect of loading direction on the inelastic cyclic behavior of material.…”

Section: Numerical Studymentioning

confidence: 99%

Numerical and experimental investigations on inelastic cyclic performance of mid‐span gusset plate connections

Kumar

Sahoo

2018

Earthq Engng Struct Dyn

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Summary The design and detailing of gusset plate connections greatly influence the seismic performance of a special concentrically braced frame (SCBF). Recently, a balanced design approach has been proposed in order to develop significant inelastic deformation from multiple yield mechanisms and to delay the failure of connections of SCBF system. Although extensive studies have been conducted on the corner gusset plate connections of SCBFs, research on the detailing of mid‐span beam gusset plates is rather limited. This study aims at investigating the required free length for the detailing of the mid‐span gusset plates with different brace slenderness ratios. A nonlinear finite element analysis has been conducted for a braced frame with 4 different values of linear clearance in the mid‐span gusset plates and 2 values of brace slenderness ratios. In all simulation models, the corner gusset plates have been designed using balanced design approach and detailed using an elliptical clearance of 8 times the gusset plate thickness. An experimental study has also been conducted on 2 gusset plate sub‐assemblages having similar brace slenderness ratio but with 2 different values of linear clearance in the middle gusset plates. The lateral drift capacity corresponding to the brace fracture and the level of damage are found to be dependent on the detailing of the gusset plates. Based on the results of numerical and experimental studies, the required free length has been recommended for the detailing of middle gusset plates of SCBFs of different brace slenderness ratios.

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“…The description of factors influencing the material behavior is very extensive and all the aspects can not be included in one paper. The basic phenomena concerning the cyclic plasticity are mentioned in this paper, more about this issue can be found in the chapter Phenomenological Modelling of Cyclic Plasticity of the book Numerical Modelling [1]. The complex behavior of metals under cyclic loading comprises especially the cyclic hardening/softening, deviation from the Masing's behavior, additional hardening as the consequence of nonproportional loading and cyclic creep also called ratcheting.…”

Section: Introductionmentioning

confidence: 99%

Uniaxial and Biaxial Ratcheting of ST52 Steel under Variable Amplitude Loading – Experiments and Modeling

Halama

Sedlák

Fusek

et al. 2015

Procedia Engineering

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The paper shows results of experiments focused on the influence of loading frequency on ratcheting as well as interesting results obtained from uniaxial tests and biaxial tests with rectangular and circular loading paths under variable amplitude loading realized on the ST 52 steel at the VŠB-Technical University of Ostrava. The model based on the AbdelKarim-Ohno kinematic hardening rule and Calloch isotropic hardening rule was used for stress-strain behavior description in finite element analysis using commercial software Ansys. The material model was implemented into the FE code using a fortran subroutine. Results of simulations containing ratcheting and cyclic hardening effects correspond with experiments very well.

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Phenomenological Modelling of Cyclic Plasticity

Cited by 41 publications

References 26 publications

Characterizing the Role of Plasticity in Structural Response to High Speed Flows

Characterizing the Role of Plasticity in Structural Response to High Speed Flows

Numerical and experimental investigations on inelastic cyclic performance of mid‐span gusset plate connections

Uniaxial and Biaxial Ratcheting of ST52 Steel under Variable Amplitude Loading – Experiments and Modeling

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