Most cars are Steel (sheet metal) Some are Aluminum. Corvettes are Fiberglass, Some saturns had steel with plastic skins on the doors and the ultimate DeLorean was Stainless steel.
Polypropylene
Sheet Steel
A car chassis is made of heavy boxed steel, stamped steel or aluminum.
Usually steel.
There are many different materials that a car rim can be made of. Some of these materials are chrome, aluminum, steel or plastic. Aluminum is the most popular material for car rims to be made of.
The same material as your car or mine.
A car fender
Polypropylene
It will be made of many components the casing material will not matter much.
The fender of the car is located on the front sides of the car. The fenders sit right above the tires.
Sheet Steel
'The fender on my car got smashed in the wreck I was in.'
A car chassis is made of heavy boxed steel, stamped steel or aluminum.
Safety glass, same as your car or mine.
Fender guitars are made of wood.
Usually steel.
Either by volumetric compressions, which are based on the material's bulk modulus, or shear stress (think of a multi-car fender-bender where the first car hits the second, hits the third, etc.) which is based on the material's shear modulus.