B d) Figure Q1 shows a partially drilled shaft fixed at its left hand end and subjected to both a downward force of 2 kN and a torque of 1000 Nm at its right hand end. Determine the magnitudes of the principal stresses and the maximum and minimum shear stresses at point A, point B and point C. -Fixed Surface 母 Dimensions in mm 100 50 Figure Q1 A 2 kN 040 ע 1000 Nm 020