Oblique impact responses of Hybrid III and a new headform with more biofidelic coefficient of friction and moments of inertia

Xiancheng Yu, Peter Halldin, Mazdak Ghajari

Frontiers in Bioengineering and Biotechnology, 2022

Abstract

New oblique impact methods for evaluating head injury mitigation effects of helmets are emerging, which mandate measuring both translational and rotational kinematics of the headform. These methods need headforms with biofidelic mass, moments of inertia (MoIs), and coefficient of friction (CoF). To fulfill this need, working group 11 of the European standardization head protection committee (CEN/TC158) has been working on the development of a new headform with realistic MoIs and CoF, based on recent biomechanics research on the human head. In this study, we used a version of this headform (Cellbond) to test a motorcycle helmet under the oblique impact at 8 m/s at five different locations. We also used the Hybrid III headform, which is commonly used in the helmet oblique impact. We tested whether there is a difference between the predictions of the headforms in terms of injury metrics based on head kinematics, including peak translational and rotational acceleration, peak rotational velocity, and BrIC (brain injury criterion). We also used the Imperial College finite element model of the human head to predict the strain and strain rate across the brain and tested whether there is a…

Cite as (BibTeX)

@article{yu-2022-oblique-impact-responses-of,
  title={Oblique impact responses of Hybrid III and a new headform with more biofidelic coefficient of friction and moments of inertia},
  author={Xiancheng Yu and Peter Halldin and Mazdak Ghajari},
  journal={Frontiers in Bioengineering and Biotechnology},
  year={2022},
  doi={10.3389/fbioe.2022.860435}
}