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Issue 32, 2020
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A data-driven computational scheme for the nonlinear mechanical properties of cellular mechanical metamaterials under large deformation

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Abstract

Cellular mechanical metamaterials are a special class of materials whose mechanical properties are primarily determined by their geometry. However, capturing the nonlinear mechanical behavior of these materials, especially those with complex geometries and under large deformation, can be challenging due to inherent computational complexity. In this work, we propose a data-driven multiscale computational scheme as a possible route to resolve this challenge. We use a neural network to approximate the effective strain energy density as a function of cellular geometry and overall deformation. The network is constructed by “learning” from the data generated by finite element calculation of a set of representative volume elements at cellular scales. This effective strain energy density is then used to predict the mechanical responses of cellular materials at larger scales. Compared with direct finite element simulation, the proposed scheme can reduce the computational time up to two orders of magnitude. Potentially, this scheme can facilitate new optimization algorithms for designing cellular materials of highly specific mechanical properties.

Graphical abstract: A data-driven computational scheme for the nonlinear mechanical properties of cellular mechanical metamaterials under large deformation

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Supplementary files

Article information


Submitted
20 Mar 2020
Accepted
03 Jul 2020
First published
14 Jul 2020

This article is Open Access

Soft Matter, 2020,16, 7524-7534
Article type
Paper

A data-driven computational scheme for the nonlinear mechanical properties of cellular mechanical metamaterials under large deformation

T. Xue, A. Beatson, M. Chiaramonte, G. Roeder, J. T. Ash, Y. Menguc, S. Adriaenssens, R. P. Adams and S. Mao, Soft Matter, 2020, 16, 7524
DOI: 10.1039/D0SM00488J

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