This paper is concerned with CAD techniques to solve the multi-objective problem of designing optimum disc brakes. The geometrical parameters affecting disk brake design such as the outer and inner disc diameters, disc thickness, pad thickness and pad angle are considered. A computer aided optimum design program is constructed with full graphics interface for automatic viewing and further detailing of the design construction. The design vector for optimizing disc brakes includes the outer disc diameters, diameter ratio, disc thickness, and pad angle. The multi-objectives formulation satisfies maximum attained torque; minimum actuating force; minimum thermal stresses; minimum temperature and minimum disc volume. A comparison with previous optimization results indicates a marked saving since previous results did not consider all design objectives and parameters.

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