Question

A bolt of diameter d connects the marine propeller to a boat’s driveshaft (diameter of driveshaft is D). To protect the engine and transmission if the propeller accidentally strikes an underwater obstacle, the bolt is designed to be cut when the shear stress acting on it reaches cut. Determine the contact force between the blade and obstacle, Fcontact, that will cause the bolt to be sheared, assuming effective radius between the point of contact on the blade and the center of the driveshaft is h. (20 points)

Answer 1