Abstract
Density distributions, during the uniaxial cold compaction of an alumina powder, are obtained by both experimental and numercal studies. The density distributions of cylindrical specimens, compressed from one side, were measured with a special technique using X-ray imaging where fine lead balls were incorporated into the compacts. A constitutive model, based on the theory of non-linear elasticity, in which the mechanical behaviour of the powder required for the numerical calculations are measured experimentally, has been adopted by using the finite element method. The influence of die wall friction and process variables on densification are discussed in detail. It is shown that the numerical results, obtained from the numerical model, agree well with the corresponding experimental results obtained from investigations on the die compaction of the alumina powder.
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