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Homework Help: mechanics of materials

Posted by dmkp on Monday, January 28, 2013 at 12:53pm.

A hollow circular shaft has an external diameter of 160mm and an internal diameter of 120mm. Calculagte the polar second moment of areaof the shaft and the maximum and minimum shear stress produced when the applied moment is 40kN m.

• mechanics of materials - Elena, Monday, January 28, 2013 at 2:53pm

  D=150 mm =0.15 m d= 120 mm = 0.12 m
  T=40 kN•m = 40000 N•m.
  
  J=π(D²-d²)/32 =...
  
  T/J=Gθ/L=τ(min)/r,
  τ(min) = Tr/J=Td/2J=...
  
  T/J=Gθ/L=τ(max)/R,
  τ(max) = TR/J=TD/2J=...
  

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