Question

A low carbon steel shaft is designed to have a diameter of 30 mm. It is to be subjected to an axial load (P-30 kN), a moment (M-200 N-m), and a torque (T-300 N-m). Assume the yield stress for the steel is (280 MPa), the Poisson's ratio is (v= 0.29), and the safety factor is (1-1). Calculate the margin of safety using the following failure theories. a.) Rankine Criteria (Maximum Principal Stress) b.) Tresca Criteria (Maximum Shear Stress) c.) Saint Venant Criteria (Maximum Principal Strain) d.) Von Mises Criteria (Energy Distortion) 4-10.)

Answer 1

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2 650.3 4x 300 10 T (30)3 Rawkive he E. S 2

Rukia im m2 Now ノ F.S F S FS.33 mo s

11Imm2 117-S8 2 ma.ntinof Safety MOS 23-

2. e, 17-88 F S E