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PTW Passive Safety: Numerical Study of Standard Impact Scenarios with Rider Injury Risk Assessment

Tianjin University of Science and Technology-Wenle Lv
University of West Bohemia-Tomasz Bonkowski, Ludek Hyncik
  • Technical Paper
  • 2020-01-0930
To be published on 2020-04-14 by SAE International in United States
Powered two-wheeler (PTW) drivers and passengers are among the group of vulnerable road users (VRU). This group uses the road transportation system together with other better-protected users such as passenger cars and truck drivers. The main vulnerability of PTW driver lies in their unequal position during the crash, due to the inability of application of the crashworthiness concept during the PTW vehicle design. This inequality could be somehow mitigated by the design of personal protective equipment (PPE). Mostly the design of the PPE's is led by the standards which often are obsolete and takes into account only simple drop-tests (ECE 22.05). Those test did not take into account complicated kinematics of the motorcycle accidents and biomechanics of the human body. The authors propose a virtual approach for the PTW rider injury risk assessment, which coupled with the pre-impact conditions, could be used for the new PPE protection standards preparation. In this paper, authors want to present a numerical study on most common PTW Impact Scenarios, which are described in ISO 13232. The simulations of the…
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Rider Stature Influence to Injury Risk in Motorcycle Rear Impact to Car

Tianjin University of Science and Technology-Wenle Lv
University of West Bohemia-Ludek Hyncik, Tomasz Bonkowski
Published 2019-03-25 by SAE International in United States
Road traffic accidents cause one of the highest numbers of severe injuries. Approximately 1.25 million people die each year as a result of road traffic crashes and between 20 and 50 million more people suffer non-fatal injuries, with many incurring a disability. Nearly half of those dying on the roads are so-called vulnerable road users, namely pedestrians, cyclists and two-wheeler riders including motorcyclists. Those vulnerable road users usually undergo complex kinematics and complex loading caused by the other vehicle impact.Virtual human body biomechanical models play an important role to assess the injuries during the impact loading especially for scenarios, where complex dynamical loading is taken into account. An additional benefit of some virtual human models is their scalability, so that they can assess the injury risk for the particular subject taking into account a wide spectrum of the whole population.The presented work shows the motorcycle rider injury risk analysis during the rear motorcycle accident to the car using the virtual approach by the numerical simulation taking into account the variability of the human body. The…
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Reconstruction of Pediatric Occupant Kinematic Responses Using Finite Element Method in a Real-World Lateral Impact

Tianjin University of Science and Technology-Haiyan Li, Hongfei Zhao, Shihai Cui
Wayne State University-Xin Jin, Binhui Jiang, King H. Yang
Published 2017-03-28 by SAE International in United States
Computational human body models, especially detailed finite element models are suitable for investigation of human body kinematic responses and injury mechanism. A real-world lateral vehicle-tree impact accident was reconstructed by using finite element method according to the accident description in the CIREN database. At first, a baseline vehicle FE model was modified and validated according to the NCAP lateral impact test. The interaction between the car and the tree in the accident was simulated using LS-Dyna software. Parameters that affect the simulation results, such as the initial pre-crash speed, impact direction, and the initial impact location on the vehicle, were analyzed. The parameters were determined by matching the simulated vehicle body deformations and kinematics to the accident reports. The output speed and acceleration of rear seat from the vehicle-tree simulation will be directly applied to a simplified occupant-seat system using the CHARM-10 model to simulate the occupant-vehicle interaction in the next study. These results have shown that FE simulation can help in accident reconstruction and investigation of the pediatric injury in real-world impact accidents.
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