1. Singapore Centre for 3D Printing School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore
2. HP‐NTU Digital Manufacturing Corporate Lab School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore
3. School of Traffic and Transportation Engineering Central South University Changsha 410075 China
4. School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA