1. Department of Mechanical Engineering, College of Design and Engineering, National University of Singapore, Singapore 117575, Singapore
2. Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education; National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China
3. Department of Biomedical Engineering, College of Design and Engineering, National University of Singapore, Singapore 117575, Singapore
4. Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin 999077, Hong Kong, China
5. Department of Mechanical and Aerospace Engineering, University of California, San Diego, La Jolla, California 92093, United States of America