J.Physique IV 6 Colloque C6, pp. 395-402, 1996
HIERARCHICAL MODELING OF THE MECHANICAL BEHAVIOR OF HIGH
SPEED STEELS AS LAYER-STRUCTURED PARTICULATE MMCs
A.F. Plankensteiner, H.J. Böhm, F.G. Rammerstofer and
Institute of Lightweight Structures and Aerospace
High Speed Steels (HSS) produced by electro-slag remelting can be viewed as
particle reinforced Metal Matrix Composites (MMCs) consisting of alternating
layers of low and high inclusion volume fraction.
These phase arrangements require specific models to be used in analytical
and numerical studies of the elastoplastic response.
In the present study, a hierarchical micro-meso-macro approach is discussed,
which combines the Multi-Particle Effective Field Method (MEFM) for describing
the matrix-inclusion topology at the microscale with an extended lamination
theory for handling the layered geometry at the mesoscale.
In addition, a Finite Element based two-dimensional method is presented, in
which HSS is modeled as a material with a graded microstructure.
The obtained results are discussed in terms of overall elastoplastic
behavior and of damage relevant microscale fields.