Cutting and Slicing Weak Solids
| Autor: | Yves Pomeau, Serge Mora |
|---|---|
| Přispěvatelé: | Physique et Mécanique des Milieux Divisés (PMMD), Laboratoire de Mécanique et Génie Civil (LMGC), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'hydrodynamique (LadHyX), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Characteristic length Blade (geometry) Fluid Dynamics (physics.flu-dyn) General Physics and Astronomy FOS: Physical sciences Fracture mechanics Mechanics Physics - Fluid Dynamics Edge (geometry) engineering.material Condensed Matter - Soft Condensed Matter [SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph] 01 natural sciences [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] Stress (mechanics) Physics::Fluid Dynamics Viscosity Coating 0103 physical sciences engineering Soft Condensed Matter (cond-mat.soft) Wafer dicing 010306 general physics |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2020, 125 (3), ⟨10.1103/PhysRevLett.125.038002⟩ |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.1103/PhysRevLett.125.038002⟩ |
| Popis: | International audience; Dicing soft solids with a sharp knife is quicker and smoother if the blade is sliding rapidly parallel to its edge in addition to the normal squeezing motion. We explain this common observation with a consistent theory suited for soft gels and departing from the standard theories of elastic fracture mechanics relied on for a century. The gel is assumed to fail locally when submitted to stresses exceeding a threshold σ 1. The changes in its structure generate a liquid layer coating the blade and transmitting the stress through viscous forces. The driving parameters are the ratio U=W of the normal to the tangential velocity of the blade, and the characteristic length ηW=σ 1 , with η the viscosity of the liquid layer. The existence of a maximal value of U=W for a steady regime explains the crucial role of the tangential velocity for slicing biological and other soft materials. |
| Databáze: | OpenAIRE |
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