Computational design of metamaterials with self contact
Dalklint, Anna LU ; Sjövall, Filip LU
; Wallin, Mathias
LU
; Watts, Seth
and Tortorelli, Daniel
(2023)
In Computer Methods in Applied Mechanics and Engineering
417.
- Abstract
Inverse homogenization in combination with contact modeling, topology optimization and shape optimization is used to design metamaterials with optimized macroscopic response. The homogenization assumes length scale separation which allows the non-linear macroscopic behavior to be obtained by analyzing a single unit cell in a lattice structure. Self contact in the unit cell, which is modeled using a third medium contact method, is leveraged to obtain a complex homogenized response. The inverse homogenization problem is initially formulated as a topology optimization problem, where the macroscopic stress–strain behavior is tuned to our liking. However, it is well known that boundary phenomena are difficult to model in topology... (More)
Inverse homogenization in combination with contact modeling, topology optimization and shape optimization is used to design metamaterials with optimized macroscopic response. The homogenization assumes length scale separation which allows the non-linear macroscopic behavior to be obtained by analyzing a single unit cell in a lattice structure. Self contact in the unit cell, which is modeled using a third medium contact method, is leveraged to obtain a complex homogenized response. The inverse homogenization problem is initially formulated as a topology optimization problem, where the macroscopic stress–strain behavior is tuned to our liking. However, it is well known that boundary phenomena are difficult to model in topology optimization and that interface modeling is crucial to accurately analyze contact. For that reason, the boundary representation of the topology optimized design is extracted and used as initial design in a subsequent shape optimization. The behaviors of our designs are verified by performing rigorous post-processing analyzes using conforming meshes and conventional contact formulations.
(Less)
- author
- Dalklint, Anna
LU
; Sjövall, Filip
LU
; Wallin, Mathias
LU
; Watts, Seth
and Tortorelli, Daniel
- organization
- publishing date
- 2023-12-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Finite strain, Internal contact, Shape optimization, Third medium contact method, Topology optimization, Tunable material properties
- in
- Computer Methods in Applied Mechanics and Engineering
- volume
- 417
- article number
- 116424
- publisher
- Elsevier
- external identifiers
-
- scopus:85171180815
- ISSN
- 0045-7825
- DOI
- 10.1016/j.cma.2023.116424
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2023 The Author(s)
- id
- b57375c2-3224-42a2-b109-b86489fcbae7
- date added to LUP
- 2024-01-12 09:54:10
- date last changed
- 2024-01-12 10:08:05
@article{b57375c2-3224-42a2-b109-b86489fcbae7,
abstract = {{<p>Inverse homogenization in combination with contact modeling, topology optimization and shape optimization is used to design metamaterials with optimized macroscopic response. The homogenization assumes length scale separation which allows the non-linear macroscopic behavior to be obtained by analyzing a single unit cell in a lattice structure. Self contact in the unit cell, which is modeled using a third medium contact method, is leveraged to obtain a complex homogenized response. The inverse homogenization problem is initially formulated as a topology optimization problem, where the macroscopic stress–strain behavior is tuned to our liking. However, it is well known that boundary phenomena are difficult to model in topology optimization and that interface modeling is crucial to accurately analyze contact. For that reason, the boundary representation of the topology optimized design is extracted and used as initial design in a subsequent shape optimization. The behaviors of our designs are verified by performing rigorous post-processing analyzes using conforming meshes and conventional contact formulations.</p>}},
author = {{Dalklint, Anna and Sjövall, Filip and Wallin, Mathias and Watts, Seth and Tortorelli, Daniel}},
issn = {{0045-7825}},
keywords = {{Finite strain; Internal contact; Shape optimization; Third medium contact method; Topology optimization; Tunable material properties}},
language = {{eng}},
month = {{12}},
publisher = {{Elsevier}},
series = {{Computer Methods in Applied Mechanics and Engineering}},
title = {{Computational design of metamaterials with self contact}},
url = {{http://dx.doi.org/10.1016/j.cma.2023.116424}},
doi = {{10.1016/j.cma.2023.116424}},
volume = {{417}},
year = {{2023}},
}