MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Prediction of the Forming Limit of Porous Metals Using the Finite Element Method
Hyoung Seop KimDong Nyung Lee
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JOURNALS FREE ACCESS

2004 Volume 45 Issue 6 Pages 1829-1832

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Abstract

To predict the forming limit diagram of porous metals, we use the elasto-plastic finite element method in conjunction with a critical relative density criterion to simulate the deformation behavior in the upsetting of porous metallic specimens. We predict the strain instability of porous cylindrical specimens by calculating the strain paths during deformation. Strain instability is the point where axial strain starts to increase in compression. By using strain instability as a ductile fracture criterion of porous metals, we calculate a forming limit that agrees well with the experimental forming limit. The calculated relative density in crack initiation is higher than the critical relative density.

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© 2004 The Japan Institute of Metals and Materials
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