An Anisotropic Model for the Plastic Response of Powder Compacts

Abstract:

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In this paper we present an anisotropic compaction model based on a generic modeling framework. The model is a generalization of Hill’s anisotropic model to compressible materials and reduces to a Cam-clay type model in the isotropic limit. The model has been calibrated using experimental data for a commercial steel powder obtained from a computer controlled triaxial cell in which the yield surface was probed following loading along different paths in stress and strain space. Closed-form analytical expressions are presented for the yield surface as a function of the inelastic strain. The model has been implemented in the general purpose finite element code ABAQUS. Simulations are presented which explore the effect of a detailed structure of the constitutive law on the compaction response.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

1809-1812

DOI:

10.4028/www.scientific.net/MSF.561-565.1809

Citation:

W. R. Ruziwa and A. C.F. Cocks, "An Anisotropic Model for the Plastic Response of Powder Compacts", Materials Science Forum, Vols. 561-565, pp. 1809-1812, 2007

Online since:

October 2007

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$35.00

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