Collapse of liquid-overfilled strain-isolation substrates in wearable electronics. (15th June 2017)

• Record Type: Journal Article
• Authors: Wang, Xiufeng; Ma, Yinji; Xue, Yeguang; Luan, Haiwen; Pharr, Matt; Feng, Xue; Rogers, John A.; Huang, Yonggang
• Is Part Of: International journal of solids and structures. Volume 117(2017)
• Page Start: 137
• Page End: 142
• Publication Date: 2017-06-15
• Subjects: Wearable electronics -- Strain isolation -- Roof collapse -- Air-filled -- Liquid-filled -- Liquid-overfilled cavities; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2017.03.031
• Languages: English
• ISSNs: 0020-7683

Abstract

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.