1. Soft Materials
Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, Ohio 45433, United States
2. Department of Mechanical and Materials Engineering, Wright State University, Dayton, Ohio 45435, United States
3. National Research Council, Washington, D.C. 20001, United States
4. Department of Mechanical Engineering-Engineering Mechanics, Michigan Technological University, Houghton, Michigan 49931, United States