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Pedro Miguel Nunes Pereira de Almeida Reis

Publications associées (105)

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How Cats Lap: Water Uptake by Felis catus

Pedro Miguel Nunes Pereira de Almeida Reis

Animals have developed a range of drinking strategies depending on physiological and environmental constraints. Vertebrates with incomplete cheeks use their tongue to drink; the most common example is the lapping of cats and dogs. We show that the domestic ...

American Association for the Advancement of Science2010

Rolling Ribbons

Pedro Miguel Nunes Pereira de Almeida Reis, John Bush

We present the results of a combined experimental and theoretical investigation of rolling elastic ribbons. Particular attention is given to characterizing the steady shapes that arise in static and dynamic rolling configurations. In both cases, above a cr ...

American Physical Society2010

Tearing Graphene Sheets From Adhesive Substrates Produces Tapered Nanoribbons

Pedro Miguel Nunes Pereira de Almeida Reis

Graphene is a truly two-dimensional atomic crystal with exceptional electronic and mechanical properties. Whereas conventional bulk and thin-film materials have been studied extensively, the key mechanical properties of graphene, such as tearing and cracki ...

Wiley-Blackwell2010

Grabbing water

Pedro Miguel Nunes Pereira de Almeida Reis, John Bush

We introduce a novel technique for grabbing water with a flexible solid. This new passive pipetting mechanism was inspired by floating flowers and relies purely on the coupling of the elasticity of thin plates and the hydrodynamic forces at the liquid inte ...

Royal Society of Chemistry2010

The Clapping Book: Wind-Driven Oscillations in a Stack of Elastic Sheets

Pedro Miguel Nunes Pereira de Almeida Reis

We present a hybrid experimental and theoretical study on the oscillatory behavior exhibited by multiple thin sheets under aerodynamic loading. Our clapping book consists of a stack of paper, clamped at the downstream end and placed in a wind tunnel with s ...

American Physical Society2010

Negative Poisson's Ratio Behavior Induced by an Elastic Instability

Pedro Miguel Nunes Pereira de Almeida Reis

Negative Poisson's ratio behavior has been uncovered in cellular solids that comprise a solid matrix with a square array of circular voids. The simplicity of the fabrication implies robust behavior, which is relevant over a range of scales. The behavior re ...

Wiley-Blackwell2010

Localization through Surface Folding in Solid Foams under Compression

Pedro Miguel Nunes Pereira de Almeida Reis

We report a combined experimental and theoretical study of the compression of a solid foam coated with a thin elastic film. Past a critical compression threshold, a pattern of localized folds emerges with a characteristic size that is imposed by an instabi ...

American Physical Society2009

Granular Thermodynamics

Pedro Miguel Nunes Pereira de Almeida Reis

We present experimental evidence for a strong analogy between quasi‐2D uniform non‐equilibrium steady states (NESS) of excited granular materials and equilibrium thermodynamics. Under isochoric conditions we find that the structure of granular NESS, as mea ...

AIP2009

The macroscopic delamination of thin films from elastic substrates

Pedro Miguel Nunes Pereira de Almeida Reis

The wrinkling and delamination of stiff thin films adhered to a polymer substrate have important applications in “flexible electronics.” The resulting periodic structures, when used for circuitry, have remarkable mechanical properties because stretching or ...

2009

Tearing as a test for mechanical characterization of thin adhesive films

Pedro Miguel Nunes Pereira de Almeida Reis

Thin adhesive films have become increasingly important in applications involving packaging, coating or for advertising. Once a film is adhered to a substrate, flaps can be detached by tearing and peeling, but they narrow and collapse in pointy shapes. Simi ...

Nature Publishing Group2008