Using the most general expression for the force per unit-length acting on a general dislocation, derive expressions for the force per unit-length acting on: (i) a pure edge dislocation subjected to a pure shear stress; and (ii) a pure screw dislocation subjected to a pure shear stress.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false