Finite element simulation of large-strain single-crystal viscoplasticity: An investigation of various hardening relations

Aluminum sheets used for beverage cans show a significant anisotropic plastic material behavior in sheet metal forming operations. In a deep drawing process of cups this anisotropy leads to a non-uniform height, i.e., an earing profile. The prediction of this earing profiles is important for the optimization of the forming process. In most cases the earing behavior cannot be predicted precisely based on phenomenological material models. In the presented work a micromechanical, texture-based model is used to simulate the first two steps (cupping and redrawing) of a can forming process. The predictions of the earing profile after each step are compared to experimental data. The mechanical modeling is done with a large strain elastic visco-plastic crystal plasticity material model with Norton type flow rule for each crystal. The response of the polycrystal is approximated by a Taylor type homogenization scheme. The simulations are carried out in the framework of the finite element method. The shape of the earing profile from the finite element simulation is compared to experimental profiles.

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Finite element simulation of consolidation at large strain

Poromechanics II ◽

10.1201/9781003078807-16 ◽

2020 ◽

pp. 107-112

Author(s):

D. Bernaud ◽

V. Deudé ◽

L. Dormieux ◽

S. Maghous

Keyword(s):

Finite Element ◽

Finite Element Simulation ◽

Large Strain ◽

Element Simulation

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Finite element simulation of plane strain plastic–elastic indentation on single-crystal silicon

International Journal of Mechanical Sciences ◽

10.1016/s0020-7403(00)00018-7 ◽

2001 ◽

Vol 43 (2) ◽

pp. 313-333 ◽

Cited By ~ 34

Author(s):

M. Yoshino ◽

T. Aoki ◽

N. Chandrasekaran ◽

T. Shirakashi ◽

R. Komanduri

Keyword(s):

Finite Element ◽

Single Crystal ◽

Finite Element Simulation ◽

Plane Strain ◽

Single Crystal Silicon ◽

Crystal Silicon ◽

Element Simulation

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Simulation of a micro-milling single crystal copper process based on crystal plastic constitutive theory

SIMULATION ◽

10.1177/0037549720937051 ◽

2020 ◽

Vol 96 (12) ◽

pp. 957-968

Author(s):

Luan Yihan ◽

Meng Xiangyue ◽

Xue Liang ◽

Steven Y Liang ◽

Lu Xiaohong

Keyword(s):

Finite Element ◽

Single Crystal ◽

Simulation Model ◽

Finite Element Simulation ◽

Crystal Orientation ◽

Milling Process ◽

Micro Milling ◽

Work Piece ◽

Single Crystal Copper ◽

Element Simulation

The anisotropy of single crystal copper and crystal orientation have a significant effect on the micro-milling process. At present, there is no systematic and perfect theory to explain the influence of single crystal orientation on the micro-milling process. Therefore, it is urgent to conduct an in-depth study on the micro-milling process of single crystal copper. In this paper, based on the theory of crystal plasticity, considering the anisotropy of single crystal copper, the VUMAT material subroutine of single crystal copper is programmed by the Fortran language, and the crystal plastic constitution is introduced into the finite element simulation. The model of the micro-milling tool and work-piece is established and meshed. Considering the friction among the tool and the work-piece, material removal, etc., the three-dimensional finite element simulation model of single crystal copper micro-milling process is achieved by ABAQUS software. The validity of the simulation model of the micro-milling process of single crystal copper considering the single crystal plastic constitution is verified by experimental micro-milling forces. The research has explored a feasible way to predict the micro-milling force of single crystal copper, and has provided a reference for revealing the micro-milling mechanism of single crystal materials.

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