He received his Ph.D. degree in mechanical engineering from the University of Louisville, Louisville, KY, USA, in 2005. Liu has research and teaching experience in the areas of mechanical and machine design, computer modeling and simulation, design software development, structural mechanics, finite element analysis, crashworthiness analysis, kinematics and dynamics, vehicle system design and analysis, applied mathematics, and thermodynamics. He has been the PI or Co-PI on over $2.5 million of research funds. He serves as the editorial board member and peer reviewer for numerous refereed journals and international conferences. Liu is a professional engineer registered in Ohio and holds Memberships in ASME, SAE, and ASEE.