meC124-Fall_2004-mt1-Ritchie-soln - Date: 9/30/2004...

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Unformatted text preview: Date: 9/30/2004 UNIVERSITY OF CALIFORNIA Departments of Mechanical Engineering and Materials Science & Engineering Prof. Ritchie C-ME 124/C-MSE 113 Mechanical Behavior of Materials Midterm Exam #1 Name: SID No.: 40 3 20 2 40 1 Credit Total Credit No 1 Problem 1 At your new job in Silicon Valley,your first task is to perform a safety evalu- ation of a pressure vessel.The vessel is spherical in shape with a diameter of 2m and will be used to store highly toxic pyrophoric Silane (SiH 4 ) gas.The vessel is stored outside the processing laboratory for safety reasons.If the container fails,most of Santa Clara county will perish.In your evaluation you must answer the following questions: 1..what internal pressure will cause first yielding in the 5mm thick walls if the vessel is made from a carbon steel(uniaxial tensile properties: E=210 GPa, y =450 MPa, u =560 MPa)? 2.What are the principal stresses and the maximum shear stress at the max- imum operating pressure of 1800 kPa?...
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meC124-Fall_2004-mt1-Ritchie-soln - Date: 9/30/2004...

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