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 › peer-review

8 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

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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title = "Collapse of liquid-overfilled strain-isolation substrates in wearable electronics",

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.",

keywords = "Air-filled, Liquid-filled, Liquid-overfilled cavities, Roof collapse, Strain isolation, Wearable electronics",

author = "Xiufeng Wang and Yinji Ma and Yeguang Xue and Haiwen Luan and Matt Pharr and Xue Feng and Rogers, {John A.} and Yonggang Huang",

note = "Funding Information: X.W., Y.M. and X.F. acknowledge the support from the National Basic Research Program of China (Grant No. 2015CB351900), National Natural Science Foundation of China (Grant Nos. 11202178, 11402135, 11320101001) and Natural Science Foundation of Hunan Province (Grant No. 14JJ3082). Y.H. acknowledges the support from NSF (Grant Nos. DMR1121262, CMMI1300846, CMMI1400169 and CMMI1534120) and the NIH (Grant No. R01EB019337). Y.X. gratefully acknowledges support from the Ryan Fellowship and the Northwestern University International Institute for Nanotechnology.",

year = "2017",

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doi = "10.1016/j.ijsolstr.2017.03.031",

language = "English (US)",

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pages = "137--142",

journal = "International Journal of Solids and Structures",

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T1 - Collapse of liquid-overfilled strain-isolation substrates in wearable electronics

AU - Wang, Xiufeng

AU - Ma, Yinji

AU - Xue, Yeguang

AU - Luan, Haiwen

AU - Pharr, Matt

AU - Feng, Xue

AU - Rogers, John A.

AU - Huang, Yonggang

N1 - Funding Information: X.W., Y.M. and X.F. acknowledge the support from the National Basic Research Program of China (Grant No. 2015CB351900), National Natural Science Foundation of China (Grant Nos. 11202178, 11402135, 11320101001) and Natural Science Foundation of Hunan Province (Grant No. 14JJ3082). Y.H. acknowledges the support from NSF (Grant Nos. DMR1121262, CMMI1300846, CMMI1400169 and CMMI1534120) and the NIH (Grant No. R01EB019337). Y.X. gratefully acknowledges support from the Ryan Fellowship and the Northwestern University International Institute for Nanotechnology.

PY - 2017/6/15

Y1 - 2017/6/15

N2 - 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.

AB - 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.

KW - Air-filled

KW - Liquid-filled

KW - Liquid-overfilled cavities

KW - Roof collapse

KW - Strain isolation

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