1. Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112, USA
2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
3. Department of Mechanical Engineering, Binghamton University, Binghamton, NY 13901, USA
4. College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QL, UK