Collapse of liquid-overfilled strain-isolation substrates in wearable electronics
نویسندگان
چکیده
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 liquidoverfilled cavities, as well as for airand liquid-filled ones. It is established that the liquid-overfilled cavities are most effective to prevent roof collapse as compared to airand liquid-filled ones. © 2017 Elsevier Ltd. All rights reserved.
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