Computational Modelling of Nanoporous Materials

PAMM, vol. 23

Abstract

Abstract Recently proposed constitutive models that describe the mechanical behavior of open‐porous cellular materials take into account the random pore sizes of the materials but not the randomness in the pore shapes [1]. In the present contribution, a computational model to reconstruct the highly irregular structure of porous materials is developed using sphere packing and Laguerre‐Voronoi tessellation [2]. The mechanical structure‐property relationship is then investigated by means of finite element methods. Under compression, porous materials demonstrate linear‐elastic behaviour followed by an irreversible deformation resulting in a plateau region followed by densification [3]. In this contribution, such mechanical responses of porous materials under cyclic loading are investigated using elasto‐plastic material models. Furthermore, effects of tensile loading on the model are also discussed.

Authors 4

1. Rajesh Chandrasekaran corresponding Aachen Department of Continuum Mechanics

   RWTH Aachen University

   Affiliation as printed

   Department of Continuum Mechanics RWTH Aachen University Aachen

   Department of Continuum Mechanics, RWTH Aachen University, Aachen

   Email: [email protected]

   Rajesh Chandrasekaran

   Telephone: +49 241 80 96403

2. Markus Hillgärtner Aachen Department of Continuum Mechanics

   RWTH Aachen University

   Affiliation as printed

   Department of Continuum Mechanics RWTH Aachen University Aachen

   Department of Continuum Mechanics, RWTH Aachen University, Aachen

3. Mikhail Itskov Aachen Department of Continuum Mechanics

   RWTH Aachen University

   Affiliation as printed

   Department of Continuum Mechanics RWTH Aachen University Aachen

   Department of Continuum Mechanics, RWTH Aachen University, Aachen

4. Ameya Rege

   Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

   Affiliation as printed

   Institute of Materials Research German Aerospace Center Cologne

   Institute of Materials Research, German Aerospace Center, Cologne