1. Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, California 92093, USA
2. Materials Science and Engineering Graduate Program, University of California, San Diego, La Jolla, California 92093, USA
3. Facultad de Ingeniería and ITIC, Universidad Nacinal de Cuyo, M5502JMA Mendoza, Argentina
4. Department of Mechanical Engineering, McGill University, Quebec H3A 0C3, Canada
5. Department of Structural Engineering, University of California, San Diego, La Jolla, California 92093, USA