1. Field of Theoretical and Applied Mechanics, Department of Mechanical & Aerospace Engineering, Cornell University, Ithaca, New York 14853, United States
2. Department
of Mechanical Engineering, University of Colorado Boulder, Boulder, Colorado 80309, United States
3. Laboratoire
SIMM UMR7615, ESPCI ParisTech-CNRS-UPMC, 10 rue Vauquelin, 75005 Paris, France