Derivation of crush force versus deformation behaviour of vehicles at different impact speeds


HİMMETOĞLU S. , YILMAZ K. B. , YILDIRIM B. , TEKİN a.

22nd International Scientific on Conference Transport Means 2018, Trakai, Lithuania, 3 - 05 October 2018, pp.49-56 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • City: Trakai
  • Country: Lithuania
  • Page Numbers: pp.49-56

Abstract

© Transport Means - Proceedings of the International Conference. All rights reserved.Regulatory and consumer full-width rigid barrier (FWRB) crash tests can help to derive the crush force versus deformation behaviour of car structure and validate the finite element (FE) models of cars. However, the regulatory and consumer crash tests are performed at a specific impact speed and they are the only ones available for most researchers in the academia. In this study, the FE models of a 2010 year model passenger car and a 1997 year model van are validated successfully against the real crash test data regarding FWRB impacts at 40 km/h and 56 km/h. As real crash test data at higher impact speeds do not exist, higher speed FWRB crash tests are performed virtually using the FE models at impact speeds varying from 20 km/h to 88 km/h. As a result of the analysis presented in this study, crush force versus deformation characteristics of the car structure are obtained. Piecewise linear approximation of the crush force versus deformation curves are used in a lumped-mass model to obtain cheaply and accurately the key responses of the cars in FWRB impacts for a certain speed range. The derived crush-force versus deformation characteristics of the car front can be used in multi-body simulations of 100% overlap single vehicle impacts and two-vehicle head-on frontal collisions, thus reducing the number of costly crash tests.