1. State Key Laboratory of Nonlinear Mechanics; Institute of Mechanics; Chinese Academy of Sciences; Beijing 100190 China
2. Department of Civil and Environmental Engineering; Northwestern University; Evanston IL 60208 USA
3. Institute of High Performance Computing; A*Star; 138632 Singapore
4. Department of Chemical Engineering and Department of Materials Science and Engineering; University of Michigan; Ann Arbor MI 48109 USA
5. Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA