The principal stresses at a point in a critical section of a machine c – McqOptions

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1.	The principal stresses at a point in a critical section of a machine component are σ1 = 60 MPa; σ2 = 5 MPa and σ3 = -40 MPa. For the material of the component, the tensile yield strength is σyt = 200 MPa. According to the maximum shear stress theory, the factor of safety is
A.	1.67
B.	2
C.	3.6
D.	4
Answer» C. 3.6

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