The compound shaft is composed of bronze cylindrical segment AB and steel cylindrical segment BC. The two ends of the compound shaft are fixed to rigid supports. The external torque (T') is applied at...

Extracted text: The compound shaft is composed of bronze cylindrical segment AB and steel cylindrical segment BC. The two ends of the compound shaft are fixed to rigid supports. The external torque (T') is applied at B. The shear modulus of segment AB and BC is 40 GPa and 80 GPa, respectively. The length of the segment AB and BC is 2 m and 1 m, respectively. The diameter of the segment AB and BC is 0.05 m and 0.025 m, respectively. Determine the external torque T applied to point B so that one of the principal stresses for a point H on the surface of the segment AB is – 100 MPa. T H. B C A 2 m 1 m