Development of simulation model of an ODB

Abstract: This thesis describes the development of a simulation model of the Offset
Deformable Barrier, ODB. The barrier is used in Euro NCAP’s frontal offset
crash test and mainly consists of a hexagonal aluminium cellular solid
called honeycomb.

The main object was to create a material model in LS-DYNA representing the
material characteristics of honeycomb. The honeycomb structure is mainly
used in energy absorbing lightweight structural components because of its
high-energy absorption properties and high strength-to-weight ratio. The
orthotropic nature of the honeycomb demands extensive material testing to
be fully described in LS-DYNA

An ODB manufactured by a supplier to Euro NCAP was purchased and physical
crash testing in Gestamp Hardtech’s crash test facility has been used to
ensure that the simulation model correlates with reality, regarding to
force vs. intrusion.

A simulation model of the Offset Deformable Barrier was successfully
developed. The simulation model showed good correlation to the physical
tests. The simulation model will later on be used to evaluate the
performance of different bumper designs at Gestamp Hardtech, Luleå.