The Optimum method to design the diaphragm spring for clutches of forestry vehicles by the use of fuzzy theory was studied. With the greatest equivalent stress of diaphragm spring's working point as the objective function, six restrained conditions as well as their fuzzy features were considered in the calculation. This method makes design work simpler, but the products thus designed are higher in accuracy and have a longer service life. The method is also useful for other automobile ...
