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A brake is a mechanical device that inhibits the motion by absorbing energy from a moving system. It is used for slowing or stopping a moving vehicle, wheel, axle, or to prevent its motion, most often accomplished by friction energy. Commonly, most brakes use friction between two surfaces pressed together to convert the kinetic energy of the moving object into heat, though other methods of energy conversion may be employed. If braking is repeated or sustained in high load or high-speed conditions, the motion will be unstable and can lead to a loss of stopping power because the disc capability for braking is not enough. These phenomena are generally defined as brake fading. Brake fade is caused by an overheating brake system. This paper describes the thermal modeling and process to predict the disk temperature under a condition which causes the fade characteristics.

Various approaches have been developed recently to apply light weight technology to automotive vehicles which focuses on fuel efficiency by reducing weight and hence are environmentally friendly. This paper shows that composite materials suspension arm which is made up engineering plastic and steel have more than equal to strength and stiffness compared to forged steel. Also Composite materials suspension arm presents lightweight and low cost.