Finite Element Simulation of Single Point Incremental Forming Process of Aluminum Sheet Based on Non-associated Flow Rule

2019 ◽  
pp. 62-68
Author(s):  
Abir Bouhamed ◽  
Hanen Jrad ◽  
Lotfi Ben Said ◽  
Mondher Wali ◽  
Fakhreddine Dammak
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Incremental Forming ◽  
Single Point ◽  
Aluminum Sheet ◽  
Flow Rule ◽  
Single Point Incremental Forming ◽  
Forming Process ◽  
Element Simulation ◽  
Associated Flow Rule

scholarly journals Simulation of the micro Single Point Incremental forming process of very thin sheets

2021 ◽  
Author(s):  
Stéphanie Thuillet ◽  
Pierre-Yves Manach ◽  
Fabrice Richard ◽  
Sébastien Thibaud
Keyword(s):  
Incremental Forming ◽  
Single Point ◽  
Small Diameter ◽  
Flow Rule ◽  
Single Point Incremental Forming ◽  
Shear Tests ◽  
Forming Process ◽  
Punch Force ◽  
Plastic Potential ◽  
Associated Flow Rule

The purpose of this paper is to simulate a complex forming process with parameters identified from tensile and shear tests. An elastic-plastic model is retained which combines a Hill’s 1948 anisotropic criterion and plastic potential using a non-associated flow rule. Firstly, a mechanical characterization is made with homogenous tests like tensile and shear tests [1]. On the other hand a process of micro Single Point Incremental forming is simulated [2]. It consists in deforming a clamped blank using a hemispherical punch which has a small diameter compared to the blank dimensions. From a small-size sheet of 0.2 mm thick, a square-based pyramid is obtained incrementally, with a define height path and advanced speed, by a tool instrumented to measure the forming force, which deforms locally the material. It is shown that the non-associated flow plasticity model leads to a good agreement between experimental and numerical results for the evolution of the punch force during the process.

Single-point incremental forming of sheet metals: Experimental study and numerical simulation

2016 ◽  
Vol 231 (2) ◽  
pp. 301-312 ◽  
Author(s):  
Matteo Benedetti ◽  
Vigilio Fontanari ◽  
Bernardo Monelli ◽  
Marco Tassan
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Incremental Forming ◽  
Single Point ◽  
Integration Scheme ◽  
Al Alloy ◽  
Single Point Incremental Forming ◽  
Sheet Metals ◽  
Forming Process ◽  
Starting Point

In this article, the single-point incremental forming of sheet metals made of micro-alloyed steel and Al alloy is investigated by combining the results of numerical simulation and experimental characterization, performed during the process, as well as on the final product. A finite element model was developed to perform the process simulation, based on an explicit dynamic time integration scheme. The finite element outcomes were validated by comparison with experimental results. In particular, forming forces during the process, as well as the final shape and strain distribution on the finished component, were measured. The obtained results showed the capability of the finite element modelling to predict the material deformation process. This can be considered as a starting point for the reliable definition of the single-point incremental forming process parameters, thus avoiding expensive trial-and-error approaches, based on extensive experimental campaigns, with beneficial effects on production time.

Finite Element Simulation of Ultrasonic Incremental Forming

2016 ◽  
Vol 836-837 ◽  
pp. 452-461
Author(s):  
P.Y. Li ◽  
Qiang Liu ◽  
Wu Run An ◽  
Shu Juan Li
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Axial Force ◽  
Vibration Frequency ◽  
Incremental Forming ◽  
Single Point ◽  
Element Model ◽  
Single Point Incremental Forming ◽  
Element Simulation ◽  
Law Of Cosines

This paper briefly describes the principle of the ultrasonic single point incremental forming of the sheet metal. In which we established the finite element model and finished the finite simulation with ABAQUS. According to the simulation result, we analyzed the influence law of vibration frequency of the axis on the distribution of the stress and strain of the sheet metal, the thickness, and the axial force in the process of ultrasonic single point incremental forming of the sheet metal. The result shows that the influence on the stress and thickness of the sheet metal is minimal, and the influence on the strain follows the law of cosines in which the strain is minimum when the vibration frequency is equal to 15kHZ.The influence on the axial force is that when the frequency is f=0kHz～40kHz the axial force decreases with the increase of the frequency. However, the axial force increased dramatically with the increase of the frequency when the frequency is above 40kHz.

Texture Based Finite Element Simulation of a Two-Step Can Forming Process

2012 ◽  
Vol 504-506 ◽  
pp. 655-660 ◽  
Author(s):  
Vedran Glavas ◽  
Thomas Böhlke ◽  
Dominique Daniel ◽  
Christian Leppin
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Plastic Material ◽  
Large Strain ◽  
Material Model ◽  
Material Behavior ◽  
Flow Rule ◽  
Forming Process ◽  
Aluminum Sheets ◽  
Element Simulation

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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