Re-identification problems in forming of rigid-visco-poroplastic materials

A unified approach for parameter identification of a visco‐poroplastic material model is presented. A repressing powder forging process is analyzed. The numerical solutions for direct and inverse problems have been described. The inverse problem is solved by the use of gradient‐based methods and a s...

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Bibliographic Details
Published in:International journal for numerical methods in engineering 2008-02, Vol.73 (8), p.1077-1093
Main Author: Pokorska, Iwona
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
finite element method
Forging and extrusion
Forming
Fundamental areas of phenomenology (including applications)
identification
Inelasticity (thermoplasticity, viscoplasticity...)
Materials science
Materials synthesis
materials processing
Measurement and testing methods
metal forming
Metals. Metallurgy
Physics
Production techniques
sensitivity
Solid mechanics
Structural and continuum mechanics
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Description
Summary:A unified approach for parameter identification of a visco‐poroplastic material model is presented. A repressing powder forging process is analyzed. The numerical solutions for direct and inverse problems have been described. The inverse problem is solved by the use of gradient‐based methods and a sensitivity analysis. Numerical examples of the method proposed are presented, in which one and two parameters of the visco‐poroplastic material model were identified. Copyright © 2007 John Wiley & Sons, Ltd.
ISSN:0029-5981
1097-0207
DOI:10.1002/nme.2111