Periodic architecture for high performance shock absorbing composites

Misra, Abha and Kumar, Praveen (2013) Periodic architecture for high performance shock absorbing composites. In: Scientific Reports, 3 . 2056_1-2056_.

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Abstract

A novel composite architecture consisting of a periodic arrangement of closely-spaced spheres of a stiff material embedded in a soft matrix is proposed for extremely high damping and shock absorption capacity. Efficacy of this architecture is demonstrated by compression loading a composite, where multiple steel balls were stacked upon each other in a polydimethylsiloxane (PDMS) matrix, at a low strain-rate of 0.05 s(-1) and a very high strain-rate of >2400 s(-1). The balls slide over each other upon loading, and revert to their original position when the load is removed. Because of imposition of additional strains into the matrix via this reversible, constrained movement of the balls, the composite absorbs significantly larger energy and endures much lesser permanent damage than the monolithic PDMS during both quasi-static and impact loadings. During the impact loading, energy absorbed per unit weight for the composite was, 8 times larger than the monolithic PDMS.

Item Type:	Journal Article
Publication:	Scientific Reports
Publisher:	Nature Publishing Group
Additional Information:	Copyright of this article belongs to Nature Publishing Group.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	03 Sep 2013 07:04
Last Modified:	03 Sep 2013 07:04
URI:	http://eprints.iisc.ac.in/id/eprint/46969

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