Computational 3D models of vehicle's crash on road safety systems

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 leaves its lane could escape from the road space and hit 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 shown in this paper. They are carried out by means of LS-DYNA software, validating the results where possible by means of comparison with real crash tests. These models also allow us to evaluate the different impact effects, varying the geometric and mechanic parameters of the vehicles and of the safety systems so in this way it is possible to obtain useful indications for the design activities.

Language

  • English

Media Info

  • Pagination: 15p
  • Monograph Title: Loads roads and the information highway: 8th International Symposium on Heavy Vehicle Weights and Dimensions, 14-18 March 2004, Misty Hills Conference Centre, Muldersdrift, Gauteng, South Africa

Subject/Index Terms

Filing Info

  • Accession Number: 01390945
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 1920017305
  • Files: ATRI
  • Created Date: Aug 23 2012 5:09AM