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

doi:10.1016/j.ijsolstr.2017.03.031

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 journal › Article

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 language	English (US)
Pages (from-to)	137-142
Number of pages	6
Journal	International Journal of Solids and Structures
Volume	117
DOIs	https://doi.org/10.1016/j.ijsolstr.2017.03.031
State	Published - 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

Cite this

Wang, X., Ma, Y., Xue, Y., Luan, H., Pharr, M., Feng, X., Rogers, J. A., & Huang, Y. (2017). Collapse of liquid-overfilled strain-isolation substrates in wearable electronics. International Journal of Solids and Structures, 117, 137-142. https://doi.org/10.1016/j.ijsolstr.2017.03.031

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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.",

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AU - Ma, Yinji

AU - Xue, Yeguang

AU - Luan, Haiwen

AU - Pharr, Matt

AU - Feng, Xue

AU - Rogers, John A.

AU - Huang, Yonggang

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10.1016/j.ijsolstr.2017.03.031