Finite element study demonstrates the influence of tool motions on density distribution in ductile powders.
A finite element study of the cold compaction of ductile metal powder compacts is presented. A quadratic pressure dependent yield function is characterized by triaxial tests. Simple compression tests of fully dense specimens are used to determine the flow behavior of the particles. Elastic properties of the compact are determined from resonant frequency tests. This model is implemented in a finite element scheme. The finite element code predictions of density distribution and compaction loads are presented for two and three dimensional compaction geometries. For a given set of final tool positions, the history of tooling motions is shown to influence the final density distribution.
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Krishnaswami et al. (1995) studied this question.
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