Third medium finite element contact formulation for pneumatically actuated systems

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00376712" target="_blank" >RIV/68407700:21110/24:00376712 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.cma.2024.117262" target="_blank" >https://doi.org/10.1016/j.cma.2024.117262</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cma.2024.117262" target="_blank" >10.1016/j.cma.2024.117262</a>

Result language

angličtina

Original language name

Third medium finite element contact formulation for pneumatically actuated systems

Original language description

Active mechanical metamaterials are artificially engineered microstructures that can be externally controlled to exhibit novel and switchable mechanical behavior on the macroscopic scale. Pneumatically actuated variants of these metamaterials can then change their mechanical, acoustic, or other types of effective behavior in response to applied pressure with possible applications ranging from soft robotic actuators to phononic crystals. Such materials often undergo large deformations, leading to self-contact, which makes their modeling and generative design challenging. We propose to use the third medium method to simulate both pneumatic actuation and contact behavior. In contrast to existing formulations, we (i) combine together contact with pneumatic actuation in a single material model for the third medium, (ii) include more permissive regularization scheme for our model, penalizing gradient of pseudo-rotation and gradient of volume change only, and (iii) introduce pneumatic actuation as an exact value of Cauchy stress. Our formulation is energetically consistent and admits advanced finite element solvers, such as the modified Cholesky decomposition to detect instabilities. We demonstrate the behavior of the proposed formulation on several examples of traditional contact benchmarks, including a standard patch test, and validate it with experimental measurement.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/GX19-26143X" target="_blank" >GX19-26143X: Non-periodic pattern-forming metamaterials: Modular design and fabrication</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Computer Methods in Applied Mechanics and Engineering

ISSN

0045-7825

e-ISSN

1879-2138

Volume of the periodical

431

Issue of the periodical within the volume

August

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

23

Pages from-to

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UT code for WoS article

001290169400001

EID of the result in the Scopus database

2-s2.0-85200393388