TY - JOUR

T1 - MetamaterialFinder

T2 - A software framework for discovering and analyzing mechanical metamaterials based on simple closed curves

AU - Fleisch, Mathias

AU - Thalhamer, Andreas

AU - Schlögl, Sandra

AU - Fuchs, Peter Filipp

AU - Pinter, Gerald

AU - Berer, Michael

N1 - Publisher Copyright: © 2024

PY - 2024/4/2

Y1 - 2024/4/2

N2 - Mechanical metamaterials have gained a lot of research interest over the last years due to their unusual mechanical properties and potential use for structural applications. However, the design and analysis of mechanical metamaterials remains challenging and time-consuming. Herein, we present a software framework for automated generation, finite element modeling and analysis of extruded mechanical metamaterials based on simple closed curves. By generalizing extruded unit cells with pores defined by simple closed curves, a wide variety of existing and novel metamaterials can be created and analyzed. Each pore can either be empty or filled with one or more materials, resulting in single- or multi-material metamaterials. Since part of the mechanical response of a metamaterial is defined by the geometric parameters of a unit cell, parameter studies are directly integrated into the framework. Examples of well-established mechanical metamaterials were used as benchmark structures and compared to their analytical solutions. We also demonstrate how generalized curves can further improve the mechanical properties of these structures, for example the load bearing capabilities and range of Poisson's ratios. Furthermore, newly developed single- and multi-material designs of mechanical metamaterials with tunable Poisson's ratio are presented and analyzed with the proposed framework. The framework is implemented in Python, executed via ABAQUS and allows for unit-cell based homogenization and full-size 2D and 3D simulations. The scripts are made open source and publicly available.

AB - Mechanical metamaterials have gained a lot of research interest over the last years due to their unusual mechanical properties and potential use for structural applications. However, the design and analysis of mechanical metamaterials remains challenging and time-consuming. Herein, we present a software framework for automated generation, finite element modeling and analysis of extruded mechanical metamaterials based on simple closed curves. By generalizing extruded unit cells with pores defined by simple closed curves, a wide variety of existing and novel metamaterials can be created and analyzed. Each pore can either be empty or filled with one or more materials, resulting in single- or multi-material metamaterials. Since part of the mechanical response of a metamaterial is defined by the geometric parameters of a unit cell, parameter studies are directly integrated into the framework. Examples of well-established mechanical metamaterials were used as benchmark structures and compared to their analytical solutions. We also demonstrate how generalized curves can further improve the mechanical properties of these structures, for example the load bearing capabilities and range of Poisson's ratios. Furthermore, newly developed single- and multi-material designs of mechanical metamaterials with tunable Poisson's ratio are presented and analyzed with the proposed framework. The framework is implemented in Python, executed via ABAQUS and allows for unit-cell based homogenization and full-size 2D and 3D simulations. The scripts are made open source and publicly available.

KW - Automated design

KW - Cellular material

KW - Finite element analysis

KW - Mechanical metamaterials

KW - Poisson's ratio

UR - http://www.scopus.com/inward/record.url?scp=85189758602&partnerID=8YFLogxK

U2 - 10.1016/j.advengsoft.2024.103626

DO - 10.1016/j.advengsoft.2024.103626

M3 - Article

AN - SCOPUS:85189758602

VL - 192.2024

JO - Advances in Engineering Software

JF - Advances in Engineering Software

SN - 0965-9978

IS - June

M1 - 103626

ER -