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Deformability analysis and improvement in stretchable electronics systems through finite element analysis

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publicationProceedings of XXIV AIMETA Conference 2019
EditorsAntonio Carcaterra, Giorgio Graziani, Achille Paolone
PublisherSpringer
Pages755-763
Number of pages9
ISBN (Electronic)978-3-030-41057-5
ISBN (Print)9783030410568
DOIs
Publication statusPublished - 2020
Publication typeA4 Article in a conference publication
EventConference of the Italian Association of Theoretical and Applied Mechanics - Rome, Italy
Duration: 15 Sep 201919 Sep 2019

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364

Conference

ConferenceConference of the Italian Association of Theoretical and Applied Mechanics
CountryItaly
CityRome
Period15/09/1919/09/19

Abstract

Stretchable electronic systems employ a combination of extremely deformable substrates with electrically conductive inks printed on their surface, on which components are connected. The absence of solid metal as conductive material greatly enhances the deformability of these systems. However, although being able to sustain high deformation, the presence of rigid components heavily affects the achievable deformation levels due to strain concentrations near the interconnection area. In order to improve stretchability under these conditions, a combination of research on materials for conductive inks and optimization of the employed layout is needed. Especially for the latter, the use of Finite Element (FE) modeling is very useful, since it allows to locate critical regions for deformation behavior and to perform design optimization and instability analyses. In this work, the authors show the application of this strategy to improve mechano-electrical performance of the system under uniaxial tension by modelling and then modifying the overall stiffness of specific sample regions. Depending on the specific need, different strategies can be adopted to intervene on stiffness changes, such as material addition to specific regions. This work shows that, in particular, a simple technique such as laser cutting can be used to tailor the local material parameters at a deeper level, thus allowing decrease in stiffness gradients and a general enhancement of electrical performances under high levels of uniaxial deformation of the sample, as also predicted in the FE analyses.

Keywords

  • FEM, Optimization, Stretchable electronics

Publication forum classification

Field of science, Statistics Finland