Development of a Computational Method to Predict Occupant Motions and Neck Loads During Rollovers

The mechanics of on-road, friction-induced rollovers were studied with the aid of a three-dimensional computer code specifically derived for this purpose. Motions of the wheels, vehicle body, occupant torso, and head were computed. Kane's method was utilized to develop the dynamic equations of...

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Bibliographic Details
Published in:SAE transactions 2005-01, Vol.114, p.126-149
Main Authors: Yamaguchi, Gary T., Richards, Darrin, Larson, Robert E., Carhart, Michael R., Cargill, Robert S., Lai, William, Corrigan, Catherine Ford
Format: Article
Language:English
Subjects:
Angular velocity
Inertia
Kinematics
Neck
Rigid structures
Tires
Torso
Trucks
Vehicles
Velocity
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Summary:The mechanics of on-road, friction-induced rollovers were studied with the aid of a three-dimensional computer code specifically derived for this purpose. Motions of the wheels, vehicle body, occupant torso, and head were computed. Kane's method was utilized to develop the dynamic equations of motion in closed form. On-road rollover kinematics were compared to a dollytype rollover at lesser initial speed, but generating a similar roll rotation rate. The simulated on-road rollover created a roof impact on the leading (driver's) side, while the dolly rollover simulation created a trailing-side roof impact. No head-to-roof contacts were predicted in either simulation. The first roof contact during the dollytype roll generated greater neck loads in lateral bending than the on-road rollover. This work is considered to be the first step in developing a combined vehicle and occupant computational model for studying injury potential during rollovers.
ISSN:0096-736X
2577-1531