Abstract:
:Despite the use of helmets in American football, brain injuries are still prevalent. To reduce the burden of these injuries, novel impact mitigation systems are needed. The Vicis Zero1 (VZ1) American football helmet is unique in its use of multi-directional buckling structures sandwiched between a deformable outer shell and a stiff inner shell. The objective of this study was to develop a model of the VZ1 and to assess this unique characteristic for its role in mitigating head kinematics. The VZ1 model was developed using a bottom-up framework that emphasized material testing, constitutive model calibration, and component-level validation. Over 50 experimental tests were simulated to validate the VZ1 model. CORrelation and Analysis (CORA) was used to quantify the similarity between experimental and model head kinematics, neck forces, and impactor accelerations and forces. The VZ1 model demonstrated good correlation with an overall mean CORA score of 0.86. A parametric analysis on helmet compliance revealed that the outer shell and column stiffness influenced translational head kinematics more than rotational. For the material parameters investigated, head linear acceleration ranged from 80 to 220 g, whereas angular velocity ranged from 37 to 40 rad/s. This helmet model is open-source and serves as an in silico design platform for helmet innovation.
journal_name
Ann Biomed Engjournal_title
Annals of biomedical engineeringauthors
Giudice JS,Caudillo A,Mukherjee S,Kong K,Park G,Kent R,Panzer MBdoi
10.1007/s10439-020-02472-6subject
Has Abstractpub_date
2020-05-01 00:00:00pages
1524-1539issue
5eissn
0090-6964issn
1573-9686pii
10.1007/s10439-020-02472-6journal_volume
48pub_type
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