Static crack resistance of iron-based sintered powder materials

A boundary-value problem of static crack resistance of structurally heterogeneous sintered materials is formulated within the framework of the structurally phenomenological approach. A numerical algorithm for modeling the mechanical behavior of structurally heterogeneous cracked powder materials is proposed. Crack resistance of some structurally heterogeneous powder materials is estimated. The anomalous character of the crack resistance revealed is studied with the use of fractography. Theoretical findings are supported by results of mechanical cracking tests.