FUTURE TRENDS IN THE SIMULATION OF CRASHWORTHINESS

The development of crash simulation is traced for the two main aspects of accident simulation and vehicle design. By reference to published work it is shown that useful information can be obtained on both these aspects by the use of classical mechanics with simplified structural crush parameters. This type of analysis may use large computer systems to reproduce accidents that have taken place or micro computers to draw general conclusions about the design of vehicles and restraint systems to minimise the effects of accidents. Because of the complication of the complete simulation of the crush behaviour of sheet metal structures the method of idealising the front of a car as a series of masses connected by non-linear springs generally attributed to kamal is described. This is essentially a test aided system and other test aided methods dealt with include the side impact analysis developed by the Cranfield Impact Centre. The current state of the complete simulation of crush and buckling phenomena is sketched in together with a discussion of some of the finite element and finite difference methods available for this type of analysis. When these methods become economically viable it will theoretically be possible to design vehicle structures for any given degree of crashworthiness or to reconstruct accidents from a knowledge of the structures of the vehicles concerned. The combination of optimisation methods with the full crashworthiness simulation is thought to be beyond the capacity of current computing power but as this power is increasing such a combination will undoubtedly be available in the future. For the immediate future, however, simulation which uses the skills of the engineer and, probably, testing of components will be the main method by which vehicles are designed for crashworthiness. For the covering abstract of the conference see TRIS 391971. (TRRL)

Media Info

  • Features: Figures; References;
  • Pagination: p. 21-28

Subject/Index Terms

Filing Info

  • Accession Number: 00391976
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-85298-539-8
  • Files: ITRD, TRIS
  • Created Date: Apr 29 1985 12:00AM