Collapse of liquid-overfilled strain-isolation substrates in wearable electronics

Xiufeng Wang, Yinji Ma*, Yeguang Xue, Haiwen Luan, Matt Pharr, Xue Feng, John A. Rogers, Yonggang Huang

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Liquid that resides in a soft elastomer embedded between wearable electronics and biological tissue provides a strain-isolation effect, which enhances the wearability of the electronics. One potential drawback of this design is vulnerability to structural instability, e.g., roof collapse may lead to partial closure of the liquid-filled cavities. This issue is addressed here by overfilling liquid in the cavities to prevent roof collapse. Axisymmetric models of the roof collapse are developed to establish the scaling laws for liquid-overfilled cavities, as well as for air- and liquid-filled ones. It is established that the liquid-overfilled cavities are most effective to prevent roof collapse as compared to air- and liquid-filled ones.

Original languageEnglish (US)
Pages (from-to)137-142
Number of pages6
JournalInternational Journal of Solids and Structures
Volume117
DOIs
StatePublished - Jun 15 2017

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Keywords

  • Air-filled
  • Liquid-filled
  • Liquid-overfilled cavities
  • Roof collapse
  • Strain isolation
  • Wearable electronics

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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