Abstract
The influence of occupant restraint system on traumatic brain injuries in a front crash was computationally investigated using multibody and finite element methods in a loosely-coupled manner. A multibody dynamic analysis that includes a crash dummy and vehicle model with/without restraint system was performed. Based on the kinematic characteristics of the dummy's head obtained from the multibody dynamic analysis, two different finite element analyses with a human head model were performed. The first approach was simply to drive the finite element head model with an initial velocity and deceleration calculated from the multibody analysis. The second approach was to reconstruct the complicated crash scenario using simple head impact to a stationary wall, in which the head yielded almost identical kinematic characteristics obtained from the multibody analysis. Through the two approaches, strain-, pressure-, and motion-based brain injury metrics were assessed for three different settings of occupant restraint system.
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