1. Department of Engineering Mechanics; Chongqing University; Chongqing; 400044; P. R. China
2. Department of Design, Manufacture, and Engineering Management; University of Strathclyde; Glasgow G1 1XJ; Scotland; UK
3. WPI Research Center, Advanced Institute for Materials Research; Tohoku University; 2-1-1 Katahira, Aoba-ku; Sendai; 980-8577; Japan