Simple Plasticity Model of Two‐Surface Type

Tseng, N. T.; Lee, G. C.

doi:10.1061/(asce)0733-9399(1983)109:3(795)

Cited by 145 publications

(34 citation statements)

References 15 publications

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“…In other region, E p is function of the plastic work, W p (= d p ) where and d p are the stress and plastic strain increment, and the distance, , between the current yield stress state and the bounding surface. A two-surface theory with a yield surface and a memory surface was proposed by Tseng and Lee [11]. The memory surface, just like a bounding surface, expands isotropically in a stress space and passes through the maximum stress state that the material has experienced.…”

Section: Two-surface Plasticity Theorymentioning

confidence: 99%

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Plasticity‐fibre model for steel triangular plate energy dissipating devices

Chou

Tsai

2002

Earthq Engng Struct Dyn

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SUMMARYProperly fabricated triangular-plate added damping and sti ness (TADAS) devices can sustain a large number of yield reversals without strength degradation, thereby dissipating a signiÿcant amount of earthquake-induced energy. A pronounced isotropic-hardening e ect is recognized in the force-deformation relationships of the TADAS devices made from two grades of low yield strength steel. The proposed plasticity-ÿbre model employing two surfaces (a yield surface and a bounding surface) in plasticity theory accurately predicts the experimental responses of the TADAS devices. This model is also implemented into a computer program DRAIN2D+ to investigate a frame response with the TADAS devices. Substructure pseudo-dynamic tests and analytical studies of a two-storey steel frame constructed with the low yield strength steel, LYP-100 or LYP-235 grade, TADAS devices conÿrm that the dynamic structural response can only be predicted if the proposed plasticity-ÿbre model is used for LYP-100 steel TADAS device.

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Section: Two-surface Plasticity Theorymentioning

confidence: 99%

“…A yield surface can only translate in a stress space without shape change, and a bounding surface can only expand isotropically without movement. For annealed materials, these two surfaces can be assumed to coincide initially [11].…”

Section: Two-surface Plasticity Theorymentioning

confidence: 99%

Plasticity‐fibre model for steel triangular plate energy dissipating devices

Chou

Tsai

2002

Earthq Engng Struct Dyn

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“…A notable success was achieved by developing simplified two-surface hardening models for which the variation of plastic hardening modulus was prescribed analytically, cf. Krieg [52] or Dafalias and Popov [29], Tseng and Lee [71], McDowell [55]. The multiple hardening surface concept was generalized by Chu [26] by assuming a continuous field of yield surfaces, thus providing hardening moduli.…”

Section: Introductionmentioning

confidence: 99%

Constitutive modeling of cyclic deformation of metals under strain controlled axial extension and cyclic torsion

Mróz

Maciejewski

2017

Acta Mech

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The present work provides a formulation of a constitutive model for metals with the aim to simulate cyclic deformation under axial extension or compression assisted by cyclic torsional (or shearing) straining of specified amplitude and frequency. Such a mode of deformation was recently implemented in technological processes such as extrusion, forging and rolling, cf. Bochniak and Korbel (Eng Trans 47:351-367, 1999, J Mater Process Technol 134:120-134, 2003, Philos Mag 93:1883-1913, 2013, Mater Sci Technol 16:664-674, 2000. The constitutive model accounting for combined hardening (isotropic-kinematic) with both hardening and recovery effects is presented and calibrated for several materials: pure copper, aluminum alloy (2024), and austenitic steel. The experimental data are used to specify model parameters of materials tested, and next the cyclic response for different shear strain amplitudes is predicted and confronted with empirical data. The constitutive model is developed in order to simulate technological processes assisted by cyclic deformation.

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“…Two surface plasticity model was first described by Dafalias and Popov (Dafalias and Popov, 1975). Since the representation capability of these models is higher than the other models which contain only the isotropic or kinematic form of the hardening behavior, many researchers has started to improve these two surface plasticity models with a well described permanent softening obtained after the reverse loading conditions (McDowell, 1985a, b;Mroz, 1967;Tseng and Lee, 1983;. One of the most famous two surface plasticity models is the Yoshida-Uemori (Y-U) (Yoshida and Uemori, 2002) model which has been frequently implemented to finite element software.…”

Section: Introductionmentioning

confidence: 99%

Parameters Determination of Yoshida Uemori Model Through Optimization Process of Cyclic Tension-Compression Test and V-Bending Springback

Toros

2016

Lat. Am. j. solids struct.

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In recent years, the studies on the enhancement of the prediction capability of the sheet metal forming simulations have increased remarkably. Among the used models in the finite element simulations, the yield criteria and hardening models have a great importance for the prediction of the formability and springback. The required model parameters are determined by using the several test results, i.e. tensile, compression, biaxial stretching tests (bulge test) and cyclic tests (tension-compression). In this study, the Yoshida-Uemori (combined isotropic and kinematic) hardening model is used to determine the performance of the springback prediction. The model parameters are determined by the optimization processes of the cyclic test by finite element simulations. However, in the study besides the cyclic tests, the model parameters are also evaluated by the optimization process of both cyclic and V-die bending simulations. The springback angle predictions with the model parameters obtained by the optimization of both cyclic and V-die bending simulations are found to mimic the experimental results in a better way than those obtained from only cyclic tests. However, the cyclic simulation results are found to be close enough to the experimental results. sheet materials have anisotropic behaviors due to the rolling operation and crystal structures, the use of anisotropic yield functions in the simulations increases the accuracy of the prediction. In addition to the used anisotropic yield criterion functions, the hardening model parameters (i.e. isotropic, kinematic and combined isotropic-kinematic hardening) are also important effective parameters for the accuracy of the simulation results. Particularly, the kinematic and combined isotropic-kinematic hardening models are important for the forming simulation of the most of aluminum alloys as well as advanced high strength steels (TRIP "Transformation Induced Plasticity", TWIP "Twining Induced Plasticity", and DP "Dual Phase" steels) which have a high tendency to springback due to the relatively high yield strength they show. Recently, the prediction of the formability and springback characteristics of these materials have been shown to be enhanced by using the cyclic plasticity models in which the different deformation combinations like tensioncompression are well defined (Uemori et al., 1998(Uemori et al., , 2000. In the real stamping operations of sheet metals, some specific regions are generally exposed to different deformation path during the flowing through the die cavity. The main problem in a classical modelling (isotropic) approach is the assumption of the same mechanical responses under different loading conditions. However, most of the sheet materials behavior under forward and reverse loading directions is not the same and the difference between these loading conditions is called as Bauschinger effect. The Bauschinger effect is mainly addressed to the early yielding of the metals when the loading direction is reversed.The contribution of the Bauschinge...

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Simple Plasticity Model of Two‐Surface Type

Cited by 145 publications

References 15 publications

Plasticity‐fibre model for steel triangular plate energy dissipating devices

Plasticity‐fibre model for steel triangular plate energy dissipating devices

Constitutive modeling of cyclic deformation of metals under strain controlled axial extension and cyclic torsion

Parameters Determination of Yoshida Uemori Model Through Optimization Process of Cyclic Tension-Compression Test and V-Bending Springback

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