Structural Modeling of the Mechanical Behavior of Periodic Cellular Solids: Open-Cell Structures

Authors: Fiedler, T.¹; Ochsner, A.¹; Gracio, J.¹; Kuhn, G.²

Source: Mechanics of Composite Materials, Volume 41, Number 3, May 2005 , pp. 277-290(14)

Publisher: Springer

Buy & download fulltext article:

Price: $47.00 plus tax (Refund Policy)

Abstract:

The numerical simulation of random cellular metals, e.g., metal foams, is still connected with many unsolved problems due to their stochastic structure. Therefore, a periodic model of cellular metals is developed and its mechanical behavior is investigated numerically under uniaxial and multiaxial stress states. The main advantage of the model is that a wide range of relative densities can be covered and that test specimens of the same geometry are possible to manufacture without oversimplifying their shape. The influence of different hardening behavior and different boundary conditions on the characteristics of the material is investigated. Furthermore, the effect of internal pore pressure on its uniaxial behavior and on the shape of yield surface are determined.

Keywords: cellular metal; effective properties; nonlinear behavior; plasticity; yield surface; finite element analysis; relative density

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s11029-005-0054-4

Affiliations: 1: Center for Mechanical Technology and Automation, University of Aveiro, Aveiro, Portugal, 2: Institute of Applied Mechanics, Erlangen-Nuremberg University, Erlangen, Germany,

Publication date: 2005-05-01