Numerical Simulation of Sheet Metal Forming Processes Using a New Yield Criterion

Dan Sorin Comsa; Dorel Banabic

doi:10.4028/www.scientific.net/KEM.344.833

Paper Titles

Mechanical and Laser Micro Deep Drawing
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Computer Assisted Design of Actuator Systems for Laser Micro Adjustment
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Classification of Problems Under Uncertainty, in FEM-Based Analysis and Design of Sheet Metal Forming Operations
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Prediction on Localized Necking in Sheet Metal Forming: Finite Element Simulation and Plastic Instability in Complex Industrial Strain Paths
p.825

Numerical Simulation of Sheet Metal Forming Processes Using a New Yield Criterion
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An Intelligent Tool to Predict Fracture in Sheet Metal Forming Operations
p.841

Triangulation Based Digitizing of Tooling and Sheet Metal Part Surfaces - Measuring Technique, Analysis of Deviation to CAD and Remarks on Use of 3D-Coordinate Fields for the Finite Element Analysis
p.847

A Methodology for Real Time Surface Strain Measurement for Stamping Through Non-Contact Optical Strain Measurement System
p.855

Achieving Operational Excellence Through Systematic Complexity Reduction in Manufacturing System Design
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Numerical Simulation of Sheet Metal Forming Processes Using a New Yield Criterion

Abstract:

The paper is focused on the development of a new phenomenological yield criterion able to describe the inelastic response of sheet metals subjected to cold forming. The model consists in two components: the equivalent stress and the hardening law. The equivalent stress is a function incorporating 8 material parameters. Due to these parameters, the new formulation is able to describe four normalized yield stresses (y0, y45, y90, yb) and four coefficients of plastic anisotropy (r0, r45, r90, rb). The hardening law is defined as a linearly asymptotic function containing 4 material parameters. The numerical tests presented in the last section of the paper prove the capability of the elastoplastic constitutive models based on the new yield criterion to model the earing as well as the wrinkling phenomena accompanying the deep-drawing process.

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Periodical:

Key Engineering Materials (Volume 344)

Pages:

833-840

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.344.833

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Online since:

July 2007

Authors:

Dan Sorin Comsa, Dorel Banabic

Keywords:

Finite Element (FE) Simulation, Sheet Metal Forming, Yield Criterion

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References

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