Mater.Sci.Engng. A259, 73--84, 1999


HIERARCHICAL MODELS FOR SIMULATING THE MECHANICAL BEHAVIOR OF HETEROGENEOUS MATERIALS: AN APPROACH TO HIGH SPEED STEEL

F.G. Rammerstorfer¹, A.F. Plankensteiner², F.D. Fischer³ T.Antretter³

¹Institute of Lightweight Structures and Aerospace Engineering,
TU Wien, Vienna, Austria
²Plansee AG, Reutte/Tyrol, Austria,
³Institute of Mechanics,
University of Mining and Metallurgy, Leoben, Austria


Abstract - A hierarchical modeling strategy is presented which allows the computational simulation of the thermo-mechanical behavior of materials exhibiting different morphological characteristics at different length scales. As a typical example of such materials high speed tool steels is considered as some sort of in-situ metal matrix composite containing, at the micro level, carbidic inclusions in a martensitic steel matrix, and, at the meso level, clusters or stringers of inclusion rich areas. The macroscopic stiffness and strength behavior depends on the morphology at both levels which can be taken into account simultaneously by the proposed hierarchical concept.


(hjb,990210)