Body in white referred to the sheet of the car body when all the components such as trims, glasses, moving barring parts such as fenders, hoods etc., or other parts had been welded and kept together. BIW constitutes almost 27% of the curb weight of carbs and is considered one of the important factors for a car’s functioning. There are various BIW Design Course Online that can help aspiring students.
Structures of BIW
There are mainly two structures by which BIW design can be made: the common one is a monocoque structure, where all the parts of the body are holding load with chassis structured with BIW and are combined. The second one is a body-on-frame structure where the load holder is framed mainly.
Properties of BIW
BIW has some important properties, which are as follows:
- It should have a good strength of tensile and more stiffness like torsional, dynamic, bending, and static.
- It should give a better safety quality to the body of the car and its residents against damages of various kinds like the rear, front, rollover, and side, and it must have a safety standard number 28.
- It must be capable of protecting its residents against vibration, noise, and harshness by lessening or absorbing such pressures.
- It must be easy to form and weld, highly paintable, and not too hard to design.
- It must give the best surface finish that is not rough and should not be corrosive.
BIW is made up of?
The utilisation of lightweight material in BIW becomes highly important as the economy of fuel improvement is touching the sky, and this material shares the maximum car weight. Recent environmental concerns are at their peak, so the material should be considered recyclable. Aluminium and steel have been used to make BIW. Steel is selected because of its low cost and high strength, while aluminium is selected because of its lower density, which helps reduce overall car weight.
A long debate occurs on the replacement of steel with aluminium in BIW. An outcome was a major change as the whole BIW in the i3 models of BMW is made of carbon-fibre-reinforced plastics (CFRPs). The CFRP has a more specific strength and lower density than aluminium and steel. To check the appropriateness of CFRP as a piece of equipment in designing several parts of cars and its possibility in light-weighting automobiles, BMW made a plan to develop a vehicle with a primary body made of CFRP, and they made a model of BMW i3 that was almost one-third of the main markets cost.
The primary body of the BMW i3 is made up of two modules, namely, the drive module and the life module. The life module is fully made of CFRP, and the drive module is made of aluminium entirely. As we know, batteries are responsible for the car’s heavy weight and should be recharged frequently; the lower density of CFRP helps to lower the overall burden of the BMW i3, therefore lessening the pressure on batteries and the need for frequent recharging.
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