1. Department of Civil and Environmental Engineering, California Polytechnic State University, San Luis Obispo, California 93407, United States
2. Department of Structural Engineering, University of California, San Diego, California 92093, United States
3. Program of Material Science and Engineering, University of California, San Diego, California 92093, United States
4. Department of Mechanical Engineering, University of South Florida, Tampa, Florida 33620, United States
5. Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States