Finite element implementation of hydrostatic pressure-sensitive plasticity and its application to distortional hardening model and sheet metal forming simulations

2022 ◽  
pp. 117494
Author(s):  
Seong-Yong Yoon ◽  
Frédéric Barlat ◽  
Shin-Yeong Lee ◽  
Jin-Hwan Kim ◽  
Min-Su Wi ◽  
...  
Keyword(s):  
Finite Element ◽  
Hydrostatic Pressure ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Hardening Model ◽  
Finite Element Implementation ◽  
Pressure Sensitive ◽  
Forming Simulations

scholarly journals Advanced Friction Modeling in Sheet Metal Forming

2011 ◽  
Vol 473 ◽  
pp. 715-722 ◽  
Author(s):  
J. Hol ◽  
M.V. Cid Alfaro ◽  
T. Meinders ◽  
J. Huétink
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Coefficient Of Friction ◽  
Surface Texture ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Large Scale ◽  
Friction Model ◽  
Micro Scale ◽  
Forming Simulations

The Coulomb friction model is frequently used for sheet metal forming simulations. This model incorporates a constant coefficient of friction and does not take the influence of important parameters such as contact pressure or deformation of the sheet material into account. This article presents a more advanced friction model for large-scale forming simulations based on the surface changes on the micro-scale. When two surfaces are in contact, the surface texture of a material changes due to the combination of normal loading and stretching. Consequently, shear stresses between contacting surfaces, caused by the adhesion and ploughing effect between contacting asperities, will change when the surface texture changes. A friction model has been developed which accounts for these microscopic dependencies and its influence on the friction behavior on the macro-scale. The friction model has been validated by means of finite element simulations on the micro-scale and has been implemented in a finite element code to run large scale sheet metal forming simulations. Results showed a realistic distribution of the coefficient of friction depending on the local process conditions.

scholarly journals RETRACTED: Based on PRO/E Sheet Metal Product Design Simulation

2011 ◽  
Vol 467-469 ◽  
pp. 1357-1360
Author(s):  
Hong Bo Wang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Hydrostatic Pressure ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Explicit Finite Element ◽  
Finite Element Software ◽  
Element Simulation ◽  
Simulation Results

Numerical simulation is an effective method for predicting formability of metals, and the use of computer simulation enables a significant increase in the number of tool designs that can be tested before hard tools are manufactured. Based on dynamic explicit finite element software, finite element simulation of sheet metal forming was performed to investigate the applicability of applying hydrostatic pressure on blank in multi point discrete dies. Simulation results show that using the hydrostatic pressure on blank is apposite for the process of multi point discrete dies.

Multi-Step Forward Finite Element Method for the Numerical Simulation of Sheet Metal Forming

2011 ◽  
Vol 474-476 ◽  
pp. 251-254
Author(s):  
Jian Jun Wu ◽  
Wei Liu ◽  
Yu Jing Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Deep Drawing ◽  
Metal Forming ◽  
Mapping Method ◽  
Constitutive Relationship ◽  
Element Method

The multi-step forward finite element method is presented for the numerical simulation of multi-step sheet metal forming. The traditional constitutive relationship is modified according to the multi-step forming processes, and double spreading plane based mapping method is used to obtain the initial solutions of the intermediate configurations. To verify the multi-step forward FEM, the two-step simulation of a stepped box deep-drawing part is carried out as it is in the experiment. The comparison with the results of the incremental FEM and test shows that the multi-step forward FEM is efficient for the numerical simulation of multi-step sheet metal forming processes.

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