The HiFES Seminar

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The flexible and wearable electronics system is an emerging technology for next-generation electronics. This type of electronics system can geometrically accommodate large mechanical deformations without imparting significant strains and stress in the materials from which it is constructed. Potential applications of this technology include flexible sensors, communicative packaging, transmitters and new photovoltaic and microfluidic devices, as well as areas of medicine and athletics for which flexible and conformable electronics are required.

Computational Mechanics studies reveal many of the key underlying aspects of these systems and can establish important design criteria concerning device failure. For example, results are used to indicate the maximum strain or stress in a system, or the critical strain for buckling, etc. Furthermore, studies are made to optimize mechanics and materials for circuits that exhibit maximum stretchability.

In this talk, Dr. Liu shared how in the current study, numerical simulations are used for investigations of materials and system designs for flexible electronics devices, which have excellent mechanical flexibility and make them attractive as wearable devices. The new designs are possible to build high performance circuits that are not only bendable but are also, in some cases, reversibly stretchable, with elastic responses to compressive and tensile strains of near to 100% or more. In addition, the application of computational mechanics is a path to build high performance silicon complementary metal oxide semiconductors central to consumer electronics.

Dr. Liu also shed light on the mechanical designs that remove any significant dependence of these properties on strains associated with bending, folding, draping and other modes of deformation. The talked ended with open floor discussion with the conclusion that computational studies are central to discovering the essential features of the materials and mechanics aspects that underlie the behaviour of flexible electronic systems.