Cited by 159Advanced Materials and MechanicsTopology Optimization in EngineeringMachine Learning in Materials Science

Machine-learning based design of active composite structures for 4D printing

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Hamel, Craig M, Roach, Devin J, Long, Kevin N, Demoly, Frédéric, Dunn, Martin L, Qi, H Jerry·2019·Smart Materials and Structures

Abstract

Abstract Active composites are a class of materials that have environmentally responsive components within them. One key advantage of active composites is that through mechanics design, a variety of actuation can be achieved. The development of active composites has been significantly enhanced in recent years by multimaterial 3D printing where different materials can be precisely placed in 3D space, enabling the achievement of shape-shifting of 3D printed parts, or 4D printing. In practical applications, it is highly desirable that the part shape can change in a pre-described manner, which requires the careful design of where to place different materials. However, designing an active composite structure to achieve a target shape change is challenging because it requires solving an inverse problem with spatially heterogenous, highly nonlinear (active) material behavior within a potentially complex boundary value problem. In this paper we present a machine learning approach to the design of active composite structures that can achieve target shape shifting responses. Our strategy is to combine the finite element method with an evolutionary algorithm. In order to achieve a target shape, we compose the structures of equally sized voxel units that are made of either a passive or an active material and optimize the distribution of these two material phases. The optimization method is tested against several illustrative examples in active composite design to show the agreement between the target shape and the best machine learning solution obtained.

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Authors
Hamel, C. M., Roach, D. J., Long, K. N., Demoly, F., Dunn, M. L., & Qi, H. J.
Affiliations
  • Georgia Institute of Technology (US)
  • Sandia National Laboratories (US)
  • Centre National de la Recherche Scientifique (FR)
  • University of Colorado Denver (US)
Corresponding author
Qi, H Jerry
Venue
Smart Materials and Structures
Published
2019-05-01
Volume
28
Issue
6
Pages
065005
ISSN
  • 0964-1726 (ISSN-L)
  • 1361-665X
OpenAlex
W2933287546
Cited by
159
References
38
Citations by year
2026: 14 · 2025: 25 · 2024: 27 · 2023: 27 · 2022: 28 · 2021: 16 · 2020: 19 · 2019: 3
FWCI
9.28
Type
journal article
Language
en
Open access
Locations
  • Smart Materials and Structures (publishedVersion)
  • HAL (submittedVersion)
Funders
Air Force Office of Scientific Research (FA9550-16-1-0169)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
  • Physical Sciences › Engineering › Civil and Structural Engineering › Topology Optimization in Engineering
  • Physical Sciences › Materials Science › Materials Chemistry › Machine Learning in Materials Science
Keywords
active composites, 4D printing, shape-shifting, inverse design, evolutionary algorithms, machine learning, multi-material printing, actuation, shape-changing structures

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