Generalised yield criteria of porous sintered powder metallurgy metals

A new form of yield criterion considering an anisotropic parameter for poro us sintered powder metallurgy metals has been proposed in this technical pa per. In addition to the above, the flow rule with anisotropic parameter for porous metal is introduced. The mathematical expression for the calculatio n of how stress in the case of simple compression or tension test is deduce d from the yield criteria for the P/M sintered preforms of the metals. Furt her, a new generalised form of yield criteria with five parameter constants for porous sintered powder metallurgy sheet metals has also been proposed in this technical paper. (C) 2001 Elsevier Science B.V. All rights reserved .