Experimental Procedure for Identifying Yield Criteria for Powder Materials and its Implementation

Abstract

This paper is devoted to developing an experimental/theoretical procedure for identifying yield criteria for powder materials. The experimental part includes several compression tests. The variation of the loading paths in these tests is achieved by deforming a plastically incompressible ring and powder material together. The description of the ring’s material behavior is not required to interpret experimental results, which is an advantage of the proposed method. The theoretical description of the test is provided using an analytical solution, which is also an advantage of the proposed method. The method is adopted for identifying Green’s yield criterion for aluminum powder. Comparison with other predictions of the yield criterion for this material is made.

Keywords

• powder materials
• yield criterion
• compression tests
• plasticity theory