ME342-Mid1-Spring09 - Department of Mechanical Engineering,...

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Unformatted text preview: Department of Mechanical Engineering, Yeditepe University ME 342 MACHINE ELEMENTS I – Namik Ciblak MIDTERM EXAM I, Spring 2009 NAME:____________________________________________________Time: 120 Minutes Open books and notes. Q.1 . (30%) The figure shows a pressure vessel resting on a flat support. The vessel contains a liquid pressurized to 10 MPa. The density of the liquid is 1000 kg/m 3 . Stresses are created due to the weights of the cylinder and the liquid, and, the internal fluid pressure. The cylinder should be treated as a thick-walled one. The point C is on the contact line, as shown. The point B is 0.5-mm above the point C. The point A is on the interior surface of the cylinder. a) Calculate the principal stresses at points A, B, and C. b) Determine the maximum von-Mises stress and its location. c) Determine the static safety factor using the distortion energy theory, if the yield strength of the cylinder material is given as 250 MPa....
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