Study on Ramberg-Osgood and Chaboche models for 42CrMo4 steel and some approximations

Basan, Robert; Franulović, Marina; Prebil, Ivan; Kunc, Robert

doi:10.1016/j.jcsr.2017.05.010

Cited by 44 publications

(35 citation statements)

References 18 publications

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“…In fact, as it will be shown, the "S-shaped" curves characterizing the exponential law governing the Voce model hardly fitted the trend of experimental data, making the determination of the speed of stabilization fairly inaccurate. This aspect was already observed by [6,7] in the case of different types of steels. Neither the method-proposed in [8]-for changing the hardening modulus in the kinematic part, nor that proposed in [9] where the hardening model is obtained by superimposing several parts of kinematic and isotropic hardening, seem to solve the matter, as both appear only suitable for materials (like stainless steel) for which the hardening evolution depends on strain range.…”

Section: Introductionsupporting

confidence: 73%

“…Parameter R ∞ can be positive or negative representing either cyclic hardening (R ∞ > 0) or softening (R ∞ < 0), respectively. Differentiation of Equation (6) gives [3][4][5][6][7][8][9][10][11][12][13][14][15]:…”

Section: Isotropic Materials Modelmentioning

confidence: 99%

“…This implies that all experimental data should collapse into one single curve independently on the imposed strain amplitude. On the other hand, the literature reports examples of materials-e.g., 316 stainless steel [12][13][14], nickel base superalloy [23] and 42CrMo4 steel [7]-for which the isotropic behavior depends on the strain amplitude. For the CuAg0.1 alloy considered in this work, such a dependence is not so evident, but cannot be excluded at all.…”

Section: Combined Armstrong-frederick With Proposed Isotropic Model: mentioning

confidence: 99%

See 2 more Smart Citations

An Isotropic Model for Cyclic Plasticity Calibrated on the Whole Shape of Hardening/Softening Evolution Curve

Novak

Bona

Benasciutti

2019

Metals

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This work presents a new isotropic model to describe the cyclic hardening/softening plasticity behavior of metals. The model requires three parameters to be evaluated experimentally. The physical behavior of each parameter is explained by sensitivity analysis. Compared to the Voce model, the proposed isotropic model has one more parameter, which may provide a better fit to the experimental data. For the new model, the incremental plasticity equation is also derived; this allows the model to be implemented in finite element codes, and in combination with kinematic models (Armstrong and Frederick, Chaboche), if the material cyclic hardening/softening evolution needs to be described numerically. As an example, the proposed model is applied to the case of a cyclically loaded copper alloy. An error analysis confirms a significant improvement with respect to the usual Voce formulation. Finally, a numerical algorithm is developed to implement the proposed isotropic model, currently not available in finite element codes, and to make a comparison with other cyclic plasticity models in the case of uniaxial stress and strain-controlled loading.

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Section: Introductionsupporting

confidence: 73%

Section: Isotropic Materials Modelmentioning

confidence: 99%

Section: Combined Armstrong-frederick With Proposed Isotropic Model: mentioning

confidence: 99%

See 1 more Smart Citation

An Isotropic Model for Cyclic Plasticity Calibrated on the Whole Shape of Hardening/Softening Evolution Curve

Novak

Bona

Benasciutti

2019

Metals

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“…During step 1 of Box 2, effective plastic strain increment ϵ p is solved by enforcing the consistency condition given in Equation (26) in which During step 1 of Box 2, effective plastic strain increment ϵ p is solved by enforcing the consistency condition given in Equation (26) in which…”

Section: Box 1 Overall Algorithm To Obtain Structural Strain For Platmentioning

confidence: 99%

“…Box 2 provides a detailed implementation of classical return mapping algorithm for 2D plane strain problems with material hardening behaviours modelled by the modified Ramberg-Osgood stress-strain relation. During step 1 of Box 2, effective plastic strain increment ϵ p is solved by enforcing the consistency condition given in Equation (26)…”

Section: Box 1 Overall Algorithm To Obtain Structural Strain For Platmentioning

confidence: 99%

An analytically formulated structural strain method for fatigue evaluation of welded components incorporating nonlinear hardening effects

Pei

2018

Fatigue Fract Eng Mat Struct

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An analytically formulated structural strain method is presented for performing fatigue evaluation of welded components by incorporating nonlinear material hardening effects by means of a modified Ramberg‐Osgood power law hardening model. The modified Ramberg‐Osgood model enables a consistent partitioning of elastic and plastic strain increments during both loading and unloading. For supporting 2 major forms of welded structures in practice, the new method is applied for computing structural strain defined with respect to a through‐thickness section in plate structures and cross section in piping systems. In both cases, the structural strain is formulated as the linearly deformation gradient on their respective cross sections, consistent with the “plane sections remain plane” assumption in structural mechanics. The structural strain‐based fatigue parameter is proposed and has been shown effective in correlating some well‐known low‐cycle and high‐cycle fatigue test data, ranging from gusset‐to‐plate welded plate connections to pipe girth welds.

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Stress corrosion cracking initiation susceptibility of Alloy 182 with different surface treatments

Que

Saario²,

Toivonen³

et al. 2022

Corrosion Science

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Study on Ramberg-Osgood and Chaboche models for 42CrMo4 steel and some approximations

Cited by 44 publications

References 18 publications

An Isotropic Model for Cyclic Plasticity Calibrated on the Whole Shape of Hardening/Softening Evolution Curve

An Isotropic Model for Cyclic Plasticity Calibrated on the Whole Shape of Hardening/Softening Evolution Curve

An analytically formulated structural strain method for fatigue evaluation of welded components incorporating nonlinear hardening effects

Stress corrosion cracking initiation susceptibility of Alloy 182 with different surface treatments

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