1. Department of Materials Science and Engineering Beckman Institute for Advanced Science and Technology and Frederick Seitz Materials Research Laboratory University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
2. Department of Mechanical Engineering and Department of Civil and Environmental Engineering Northwestern University, Center for Engineering and Health and Skin Disease Research Center Evanston Illinois 60208 USA
3. Department of Electrical and Computer Engineering University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
4. State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering Mechanics Dalian University of Technology Dalian 116024 China