The frames used for automobiles have changed remarkably in terms of construction, weight and material used. Today, the conventional frames have been replaced by Unibody frames because they are shorter, sturdy, and have thinner wall thickness. In order to have improved mileage, automobile manufacturers are resorting to Unibody frames in which rocker panels, floor pans and other components are welded together in a single unit. The manufacturers are using passive safety design technology to develop frames of different sizes, variations, and compositions.
The frame of an automobile is the necessary element in the designing of a car, as it is the supporting base which bears the loads laid by the terrain, engine, suspension system, tires, wheels, drive train, and steering system. It is the main backbone of the vehicle, which works just like the skeleton of bones inside the human body. A well-structured and properly built frame improves crash worthiness, passenger safety and weight efficiency.