CYCLIST HEAD TO WINDSHIELD IMPACT ANALYSIS. DEFORMATION AND PERFORATION CASE STUDY

Ovidiu Andrei CONDREA, Anghel CHIRU, George TOGANEL, Alexandru Ionut RADU, Rareș Lucian CHIRIAC

Abstract


Some particular types of accidents between motor vehicles and VRU produce partial intrusions of the VRU’s body inside the passenger compartment through the vehicle’s windshield. Collisions which result in windshield perforations can significantly alter the preconized human-body kinematics, throw distance and injuries, therefore making the reconstruction of the accident more difficult. Due to the complex nature of windshield
deformations, the current state-of-art does not allow for the different stages of windshield deformation growth to be simulated in a multibody software. This paper presents a technique for simulating vehicle-VRU impacts with windshield perforations, comprised of locally altering the exterior contour of the vehicle’s windshield damaged area, therefore being possible to simulate the intrusion inside the passenger compartment. A vehicle-cyclist crash-test which resulted in a 600 cm2 windshield perforation and was simulated by applying the presented technique is exemplified as a case study in this paper. The results of the simulations yielded similar dummy kinematics, proving the viability of the presented technique for the kinematic sequence reconstruction of impacts with windshield perforations. An analysis of the influence yielded by the generation of a windscreen perforation over the VRU transport phase and throw distance was also conducted.


Keywords


Cyclist impact; Windshield deformation; Windshield perforation; Multibody simulation

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