A hypoelasto-plastic finite strain simulation of powder compaction processes with density-dependent endochronic model

Khoei, A.R.; Bakhshiani, A.

doi:10.1016/j.ijsolstr.2004.05.013

Cited by 30 publications

(14 citation statements)

References 44 publications

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“…The model comprises two surfaces, one to reflect shear failure and the other to capture densification. Recently, Khoei et al [8,9] developed a density-dependent endochronic theory based on coupling between deviatoric and hydrostatic behavior in finite strain plasticity to simulate the compaction process of powder material.…”

Section: Introductionmentioning

confidence: 99%

3D computational modeling of powder compaction processes using a three-invariant hardening cap plasticity model

Azami

Khoei

2006

Finite Elements in Analysis and Design

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Section: Introductionmentioning

confidence: 99%

3D computational modeling of powder compaction processes using a three-invariant hardening cap plasticity model

Azami

Khoei

2006

Finite Elements in Analysis and Design

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“…These models are based on the combination of a convex yield surface consisting of a failure envelope and a hardening elliptical cap, in which the failure surface reflects the shear failure and the cap part captures the densification. Khoei and Bakhshiani [46,47] developed a density-dependent endochronic theory based on coupling between deviatoric and hydrostatic behavior to simulate the compaction process of powder material.…”

Section: Powder Constitutive Modelmentioning

confidence: 99%

Arbitrary Lagrangian–Eulerian method in plasticity of pressure-sensitive material: application to powder forming processes

et al. 2008

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In this paper, an application of Arbitrary Lagrangian-Eulerian (ALE) method is presented in plasticity behavior of pressure-sensitive material, with special reference to large deformation analysis of powder compaction process. In ALE technique, the reference configuration is used for describing the motion, instead of material configuration in Lagrangian, and spatial configuration in Eulerian formulation. The convective term is used to reflect the relative motion between the mesh and the material. Each time-step is divided into the Lagrangian phase and Eulerian phase. The convection term is neglected in the material phase, which is identical to a time-step in a standard Lagrangian analysis. The stresses and plastic internal variables are converted to account the relative mesh-material motion in the convection phase. The ALE formulation is then performed within the framework of a three-invariant cap plasticity model in order to predict the non-uniform density distribution during the large deformation of powder die pressing. The plasticity model is based on a hardening rule with the isotropic and kinematic material functions. The constitutive elasto-plastic matrix and its components are derived by using the definition of yield surface, material functions and non-linear elastic behavior, as function of hardening parameters. Finally, the numerical examples are performed to illustrate the applicability of the computational algorithm in modeling of powder forming process and the results are compared with those obtained from Lagrangian simulation in order to demonstrate the accuracy of proposed model.

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“…This set of six algebraic equations can be solved for the unknowns d p by applying the Newton-Raphson method. Once d p are known the corotational increment of stress tensor can be obtained, and then stress will be calculated from relationsˆ = nˆ + ˆ and = Rˆ R T [38].…”

Section: Numerical Integration Of Constitutive Equationsmentioning

confidence: 99%

A hypoelasto-viscoplastic endochronic model for numerical simulation of shear band localization

Khoei

Bakhshiani

2005

Finite Elements in Analysis and Design

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A hypoelasto-plastic finite strain simulation of powder compaction processes with density-dependent endochronic model

Cited by 30 publications

References 44 publications

3D computational modeling of powder compaction processes using a three-invariant hardening cap plasticity model

3D computational modeling of powder compaction processes using a three-invariant hardening cap plasticity model

Arbitrary Lagrangian–Eulerian method in plasticity of pressure-sensitive material: application to powder forming processes

A hypoelasto-viscoplastic endochronic model for numerical simulation of shear band localization

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