Progressive Deformable Barrier (PDB) based offset test method was recently proposed as an alternative to the existing regulatory test using Offset Deformable Barrier (ODB) as per ECE R94. Implications of this change on structural design of cars were studied through CAE simulations.

Comparative simulations were run with the two barriers for vehicles with different mass and effect of the barrier change was studied against the mass of the vehicle. Stiffness improvements required in car structures for similar intrusions when PDB was used were then studied. The study showed that PDB was able to absorb a lot more energy compared to ODB and this could essentially mean the car structures can be engineered with reduced energy absorbing capability while still meeting the requirements with PDB.