1. National Engineering Research Center of Novel Equipment for Polymer Processing; South China University of Technology; Guangzhou 510640 China
2. Wisconsin Institute for Discovery; University of Wisconsin-Madison; Madison Wisconsin 53715
3. Department of Mechanical Engineering; University of Wisconsin-Madison; Madison Wisconsin 53706
4. Departments of Orthopedics and Rehabilitation and Biomedical Engineering; University of Wisconsin-Madison; Madison Wisconsin 53705