Road safety is today a serious and worrying problem, for all developed Countries. In particular, the accidents with loss of vehicle trajectory show a large increase, owing to the number of cases and severity of consequences. The vehicle that leave his lane could escape from the road space and meet dangerous objects (trees, piles, walls, etc.), or invade the opposite carriageway. To ensure the protection for these occurrences, a good opportunity is offered by passive safety systems, and particularly by road safety barriers; therefore, it is important to know the evolution and the consequences of crashes on these systems. The good knowledge of the impact phenomena could not be achieved only by means of the traditional theoretical and analytical models, because of the complexity of dynamic effects, and approximation needed in calculation processes. Instead, the computational 3D FE models are able to virtually reproduce the bodies (vehicle, road section, barriers, etc.), and to evaluate their deformations and dynamic actions exchanged during the crash. Some cases of virtual impact are showed in this paper: they are carried out by means of LS-DYNA software, validating the results . if possible . by means of comparison with real crash tests. These models also allow to evaluate the different impact effects varying the geometric and mechanic parameters of the vehicles and of the safety systems: in this way it is possible to obtain useful indications for the design activities.
Computational 3D models of vehicle’s crash on road safety systems / Bonin, Guido; Cantisani, Giuseppe; Loprencipe, Giuseppe. - (2004). (Intervento presentato al convegno 8th International Symposium on heavy Vehicle Weights and Dimensions tenutosi a Muldesdrisft (Gauteng), South Africa).
Computational 3D models of vehicle’s crash on road safety systems
Guido Bonin;Giuseppe Cantisani;Giuseppe Loprencipe
2004
Abstract
Road safety is today a serious and worrying problem, for all developed Countries. In particular, the accidents with loss of vehicle trajectory show a large increase, owing to the number of cases and severity of consequences. The vehicle that leave his lane could escape from the road space and meet dangerous objects (trees, piles, walls, etc.), or invade the opposite carriageway. To ensure the protection for these occurrences, a good opportunity is offered by passive safety systems, and particularly by road safety barriers; therefore, it is important to know the evolution and the consequences of crashes on these systems. The good knowledge of the impact phenomena could not be achieved only by means of the traditional theoretical and analytical models, because of the complexity of dynamic effects, and approximation needed in calculation processes. Instead, the computational 3D FE models are able to virtually reproduce the bodies (vehicle, road section, barriers, etc.), and to evaluate their deformations and dynamic actions exchanged during the crash. Some cases of virtual impact are showed in this paper: they are carried out by means of LS-DYNA software, validating the results . if possible . by means of comparison with real crash tests. These models also allow to evaluate the different impact effects varying the geometric and mechanic parameters of the vehicles and of the safety systems: in this way it is possible to obtain useful indications for the design activities.File | Dimensione | Formato | |
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