Related publications (65)

Buckling-induced encapsulation of structured elastic shells under pressure

Pedro Miguel Nunes Pereira de Almeida Reis

We introduce a class of continuum shell structures, the Buckliball, which undergoes a structural transformation induced by buckling under pressure loading. The geometry of the Buckliball comprises a spherical shell patterned with a regular array of circula ...
2012

Analytical approximations for the collapse of an empty spherical bubble

Mohamed Farhat, Danail Obreschkow

The Rayleigh equation 3/2 (R) over dot + R(R) double over dot + p rho(-1) = 0 with initial conditions R(0) = R-0, (R) over dot(0) = 0 models the collapse of an empty spherical bubble of radius R(T) in an ideal, infinite liquid with far-field pressure p and ...
2012

A multi-scale multi-physics model of soil drying

Lyesse Laloui, Hervé Péron

Drying shrinkage is modeled at a microscale as a two-stage process of deformation and evacuation of a two-tube vessel system, based on porosimetry evolution. In the first stage water flow is driven by an external evaporation flux. Flow is associated with a ...
ASCE2011

Load Response of Periodontal Ligament: Assessment of Fluid Flow, Compressibility, and Effect of Pore Pressure

John Botsis, Marzio Bergomi, Aïssa Mellal

The periodontal ligament (PDL) functions both in tension and in compression. The presence of an extensive vascular network inside the tissue suggests a significant contribution of the fluid phase to the mechanical response. This study examined the load res ...
2010

Flow Properties of Tailored Net-Shape Thermoplastic Composite Preforms

Véronique Michaud, Patrick Blanchard, Martyn Douglas Wakeman, Simon Jespersen

A novel thermoplastic programmable preforming process, TP-P4, has been used to manufacture preforms for non-isothermal compression molding. Commingled glass and polypropylene yarns are deposited by robot onto a vacuum screen, followed by a heat-setting ope ...
Springer Netherlands2009

Robotic laser tissue welding of sclera using chitosan films

Eric Tremblay, Pablo Garcia

Purpose: To demonstrate the feasibility of scleral wound closure using a novel adhesive made of chitosan film. Methods: Five-millimeter scleral lacerations were created in enucleated pig eyes. Casted chitosan films were sized to 7×7 mm patches. Lacerations ...
2009

Shaken helical track bioreactors: Providing oxygen to high-density cultures of mammalian cells at volumes up to 1000L by surface aeration with air

Florian Maria Wurm, David Hacker, Xiuwei Zhang, Mathieu Benjamin Stettler

A new scalable reactor was developed by applying a novel mixing principle that allows the large-scale cultivation of mammalian cells simply with surface aeration using air owing to increased liquid–gas transfer compared to standard stirred-tank bioreactors ...
Elsevier2008

Experimental identification of adhesive properties between epoxy and glass

Aleksandar Sekulic

In this thesis, a simple law of adhesion with "digital" decohesion is proposed for modeling unilateral contact with adhesion, together with a stable experiment based on an original axisymmetric epoxy-stamp on glass-disc specimen for measuring the relevant ...
EPFL2008

Size effect of welded thin-walled tubular joints

Alain Nussbaumer, Manfred Hirt

This paper clarifies the terminologies used to describe the size effect on fatigue behaviour of welded joints. It summarizes the existing research on size effect in the perspective of newly defined terminologies. It identifies knowledge gaps in designing t ...
2007

High-pressure effects on the Diels-Alder reaction in room temperature ionic liquids

Paul Joseph Dyson, Gabor Laurenczy, Ana Vidis

The effect of pressure on the Diels-Alder reaction was examined in room temperature ionic liquids, followed by high-pressure FT-IR spectroscopy using pressures up to 150 MPa. Pressure enhances the kinetic sensitivity of the reaction. The kinetic effec ...
2007

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