1986 Volume 12 Issue 4 Pages 408-413
The powder yield model presented by the authors can be applied to the estimation method for the yield locus of powders as its basic framework. However, an effective search method for the parameters in the model has not yet been sufficiently developed. Hence, from this standpoint, the basic properties of parameters in the model are systematically discussed in this paper. As a result, the following conclusions are obtained.
1) The number of parameters to be searched is reduced to three (m, s and d) from four (m, n, s and d).
2) The analytical solutions of the uniaxial compressive and tensile properties are obtained. These solutions make possible a quick and precise search method for the parameters (m, s and d).
3) The parameter m depends on the stress ratio η. The parameters s and d depend on both the stress ratios κ and λ.
4) The applicability of the search method for the parameters is experimentally checked.
