Embedding topography enables fracture guidance in soft solids
| Autor: | Zachary W. Lipsky, Christopher H. Maiorana, Guy K. German, Mitchell Erbe, Travis Blank |
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| Rok vydání: | 2019 |
| Předmět: |
Multidisciplinary
Materials science Soft materials lcsh:R lcsh:Medicine 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Elastomer 01 natural sciences Article Mechanical engineering Flexible electronics 0104 chemical sciences Strain energy Membrane Interfacial delamination Robustness (computer science) Soft solids Embedding lcsh:Q Composite material lcsh:Science 0210 nano-technology |
| Zdroj: | Scientific Reports Scientific Reports, Vol 9, Iss 1, Pp 1-9 (2019) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-019-49986-1 |
| Popis: | The natural topographical microchannels in human skin have recently been shown to be capable of guiding propagating cracks. In this article we examine the ability to guide fracture by incorporating similar topographical features into both single, and dual layer elastomer membranes that exhibit uniform thickness. In single layer membranes, crack guidance is achieved by minimizing the nadir thickness of incorporated v-shaped channels, maximizing the release of localized strain energy. In dual layer membranes, crack guidance along embedded channels is achieved via interfacial delamination, which requires less energy to create a new surface than molecular debonding. In both membrane types, guided crack growth is only temporary. However, utilizing multiple embedded channels, non-contiguous crack control can be maintained at angles up to 45° from the mode I fracture condition. The ability to control and deflect fracture holds great potential for improving the robustness and lifespan of flexible electronics and stretchable sensors. |
| Databáze: | OpenAIRE |
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