How to design car and trucks body design?

Automobile engineering new imagine vehicle design concept

Hello Sagar,
Fine that you are interested in Vehicle body design.While designing it you must take considers various aspects.You should start your design and consider it for various consideration and redesign.It would be a long process,yet would be interesting.
You can participate in Various Car fabrication competitions like SUPRA,BAJA conducted by SAE.
First your body design starts with the vehicle you are designing.That is the specifications like its SUV,UTV,HV,etc., then the Speed(Engine and transmission required)Suspension,Steering,Brakes.After the collection of the this data you are confined to an outline of the design.
Second one to consider is the Aerodynamics.In aerodynamics you have to play with reducing the drag and also at the same time stopping the lift.For this you can consider reading Aerodynamics by John D Anderson.this would further refine your Outline your design.You can analyse this by means of Ansys Fluent.
Cost analysis is a must.Be clear about the cost first.On which you have to spend the most and the least.
Next important is the Ergonomics.Ergonomics makes your design comfortable to your Consumers(But not for you,You have to think and redesign and do many changes for this.)For this you can see some NPTEL videos.
Next thing is safety.In no way it is connected with Ergonomics.You see the first gives comfort this ensures life.This is more important than the previous.You have to search under Oshas.You can ensure safety by doing analysis in Ansys,Abacus or any other software.
Next your design has to be given some dynamic concepts.So learn vehicle dynamics.For this refer Thomas Gillespie.
For every design some standards must be meet with.If your design is for any competition see that the rulebook is strictly followed.
Never fail to use Computer tools to develop and optimize your ideas.
This is a great process and fine if you work as a team.
So far you have only framed the outline.Now you go to design each components.First concentrate on Engine,Transmission system,Suspension,Steering,Brake,etc.,Your make or Buy decision is important.Before you start the design make sure of the availability.
You can also post your questions here!And we can discuss on it.
You can do it without taking to account the design aspects.Yet it would cause a great trouble.Well planned would Well finished,Well designed would Well perform
All the Best!