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Midterm1-2008

# Midterm1-2008 - Mechanics-Based Design Spring 2008 March 5...

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Mechanics-Based Design Spring 2008 March 5, 2008 Examine Time: 50 min Midterm Exam - I 1. An engineer is asked to design a straight round bar that can be subjected to an end loading F (see below), with a likely maximum loading of 200 lb. The bar will be made of 303 stainless steel that has the yield strength of 35 kpsi. What is the minimum diameter of the bar to be used that maintains a minimum safety factor of 3. 2. A long cylindrical pressure vessel with hemispherical ends has an inside radius of 20 mm and a wall thickness of 5 mm. It is used for storage of nitrogen with a gas pressure of p i = 50 × 10 5 Pa and the outer wall is subjected to atmospheric pressure p o = 1 × 10 5 Pa. Draw the Mohr’s stress circle (3-D) and determine the maximum shear stress at the middle point P on
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