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Mechanical response of the interfacial composite material of an armored bubble.

(a-d) A prolate ellipsoidal bubble is subjected to uniaxial compression. The ICM undergoes plastic rearrangement and eventually extends a major axis orthogonal to the original. When the side plates that produced the compression are removed, the ellipsoid is stable in this new configuration.

Below: A graph indicates that the effective yield stress is an increasing function of the desired macroscopic strain of the system. The inset diagram indicates shearing a hexagonally close-packed (HCP) monolayer is impossible for constant surface area. The microscopic strain is about 0.15 when the particles are square-packed but work must be done to increase the surface area. Just past this point, the work put in to create the excess surface area is regained elastically as the particles can assume a HCP configuration again.

From:

Authors: Anand Bala Subramaniam, Manouk Abkarian, L. Mahadevan, and Howard Stone.

Date: May 24, 2006

Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.

Langmuir 2006, 22, 10204-10208. [1]

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