Effective Head Restraint Systems Based on Integrated Structure and Barrier Analysis

Author(s):  E.Divya, R.Latha

Abstract:   Head restraints is one of the most automotive safety feature integrated into the top of each seat to limit the rearward movement of the occupant's head, in a collision to prevent or mitigate whiplash or injury in the cervical vertebrae. Integrated head restraint refers to a head restraint formed by the upper part of the seat back, or a head restraint in which the height is adjusted and it cannot be detached from the seat . it should not be detached from the vehicle structure except by the use of tools in a mandatory circumstances. Based on a certain type car, the finite element model for the car was enhanced in such a way that the space occupied by the hybrid III dummy and safety-belt restraint system was just 50 %. The basic principle of the dynamic explicit non-linear FEM, an equation describing the rear-end crash process and finite element discretization was proved in barrier test. Then the rear-end crash was simulated and analyzed, by Solving the responses of integrated structure deformation, and the time curve of acceleration and energy absorption during the whole crash process , as well as the response of dummy and the performance indicators including head, chest, thigh etc.. The effective energy absorption effect of the main energy-absorption components, and driving safety during the rear-end crash process were analyzed and verified successfully. A more comprehensive evaluation of the car during the rear-end crash process was achieved side impact dummy.