报告时间：2025年7月7日（星期一）9:00
报告地点：格物楼二楼学术报告厅
报 告 人：Dr. Yucheng Liu
工作单位：South Dakota State University
举办单位：机械工程学院
报告简介：
This study presents car crash-induced neck injury trends in response to variations in three impact variables: velocity (10 45mph; 16.1 72.4km/h), location (front, rear, near side, and far side), and angle (-45 to 45). By employing a combined finite element (FE)-mathematical surrogate modeling approach, the number of necessary FE crash simulations was significantly reduced. Each motor vehicle collision (MVC) case was simulated with LS-DYNA software, and the extracted neck injury metrics (Nij, Nkm, and Lateral Nij) were used to train Kriging surrogate models. These models produced clear response trends indicating that increased impact velocity and locational proximity to the driver often resulted in the greatest risk of inducing neck injury. Further, the impact angle variable typically produced the greatest risk under direct or slightly oblique angles regardless of the impact location or whether the impact was directed toward the occupant. This lack of interaction between the angle and location variables was likely caused by limitations within the injury metrics, themselves, which do not account for multi-axial or oblique loading, highlighting the need for improved metrics. Finally, distinct pairings of sub-metric component responses were noted in most impact scenarios. These trends may be a signifier for the primary modality of injury and should be assessed in a future study.
报告人简介：
Dr. Yucheng Liu (PhD, PE, FASME, FSAE) is the Department Head of Mechanical Engineering (ME) Department at South Dakota State University (SDSU) and holds the Duane Sander Professor of Entrepreneurial Engineering in the Jerome J. Lohr College of Engineering at SDSU. Prior to joining SDSU in 2021, Dr. Liu was a faculty member in the Mechanical Engineering Department at Mississippi State University (MSU), where he served as Graduate Coordinator (2016 – 2021) and held the Jack Hatcher Chair in Engineering Entrepreneurship in the Bagley College of Engineering (2018 – 2021). Prior to MSU, Dr. Liu was an Assistant Professor at the University of Louisiana at Lafayette (UL Lafayette). Dr. Liu earned his PhD degree from the University of Louisville in 2005 and a bachelor’s degree from Hefei University of Technology in 1997, both in Mechanical Engineering. His research spans multiscale material modeling and simulation, high-strain-rate material performance, vehicle systems design, and renewable energy technologies. His current research focus is on understanding the process-structure-property-performance relationships of structural materials through advanced multiscale theoretical frameworks and integrated computational, experimental, AI, and machine learning methods. To date, Dr. Liu has authored over 260 peer reviewed publications, including 148 peer reviewed journal articles, holds 2 patents, and has over 3,800 citations with an H-index of 31. Ranked among the top 2% of researchers globally and top 1% in mechanical engineering by ResearchGate, he has secured and managed over $15.5 million in extramural funding across 40 grants from various private, state, and federal agencies. He has also served on review panels for many NSF, DOD, NASA, and DOE programs. Since becoming a faculty member in 2009, Dr. Liu has received numerous awards, including the Junior Faculty Researcher of the Year of the College of Engineering at UL Lafayette in 2013, the Outstanding Senior Faculty Research Award from the ME Department in 2016, MSU and BCOE Faculty Research Award in 2018, and the BCOE Service Award in 2021. Dr. Liu was named to the Jack Hatcher Chair in Engineering Entrepreneurship in 2018 and promoted to Full Professor in 2019. Dr. Liu’s professional honors include being named an ASME Fellow (2017), SAE Fellow (2019), ASEE Distinguished Member (2024), and recipient of the SAE Forest R. McFarland Award (2020). He is a registered Professional Engineer in Ohio and a member of AAAS.