At Gestamp HardTechs R&D Bumper department in Luleå, state of the art sheet metal bumpers for the automotiveindustry are produced. One part of a bumper is the crashbox, or CBX, which is designed to absorb kinetic energyduring a vehicle collision. During the design phase of a CBX, nite element crash simulations are performed beforethe crash testing of a CBX prototype, saving time and resources. However, these simulations are often performedwithout regard to the material hardening that occurs when the CBX is manufactured.

Acquiring the material hardening from forming simulations can be time consuming with the many design iterationsrequired during a bumper system development cycle. This Master's thesis has investigated the use of an alternative,quick method of acquiring hardening data from forming, using one-step solvers. A new CBX has also been designed,with a geometry whose energy absorption is inuenced maximally by the hardening acquired from the best performingone-step solver.