HOMOGENIZATION PRINCIPLE BASED MULTI-SCALE MODELING OF CELLULAR STRUCTURES
 
S. Loehnert, L. Krstulovic-Opara, M. Vesenjak, D. Mueller-Hoeppe
 
Abstract
 
Cellular materials are of particular importance as energy absorbers in numerous engineering
applications. Due to their advanced structure the numerical modeling of cellular materials
represents a particular challenge. In the presented paper the influence of a filler material on the
energy absorption characteristics of open-cell cellular specimen is observed. In order to deeply
investigate and compare its effect, regular open-cell cellular specimens have been used. For
such two phase materials, the appropriate numerical modeling approach is homogenization of
representative volume elements. The highly nonlinear material behavior of open-cell cellular
materials in compression includes several consequent collapse scenarios. This requires a
particular attention when choosing an effective material model and special care for the
homogenization procedure.