Volume 101, Number 5, March 2013
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||14 March 2013|
Soft elasticity in solids composed of ellipse-shaped particles
1 Physics Department, University of Swaziland - P/Bag, Kwaluseni, Swaziland
2 Physics Department, Rutherford Blg - 3600 rue University, McGill University, Montréal, Québec, Canada H3A 2T8
3 Department of Physics, Oakland University - Rochester, MI 48309-4487, USA
Received: 28 November 2012
Accepted: 11 February 2013
We present a method for studying the influence of internal rotational degrees of freedom on the elastic properties of crystals composed of ellipsoidal particles. We derive the conditions under which a stretched-triangular lattice of ellipsoidal particles can exhibit a vanishing shear modulus. Analytical predictions are confirmed with numerical calculations. Numerical results also show that internal rotational modes can delay the proliferation of dislocations in the plastic regime.
PACS: 62.20.D- – Elasticity / 61.50.Ah – Theory of crystal structure, crystal symmetry; calculations and modeling / 81.40.Lm – Deformation, plasticity, and creep
© EPLA, 2013
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