Considering problems of engineering simulation (with consequent analysis and optimization) the first thing that go to mind is crash-tests.
To shatter a real car is a rather expensive enjoyment.
Computer simulation allows to save a lot of time and money. Herewith, computer simulation provides much more information than real crashes.
In car deformation analysis, the deformation of hard frame of the car is of major importance
(this is the significant simplification of the problem):
The analysis of deformation of all parts of a car requires much more calculations
(thus much more powerful solver has to be used):
Not less important is to analyze not only the deformation of a car itself, but also the damage of a driver and passengers: