Midtem+II_F-07_ - ME 382 Fall 2007 Mid-term 2 Monday,...

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1 ME 382 Fall 2007 Mid-term 2 Monday, November 19, 2007 This is a closed book exam; students are allowed to use an unmarked copy of the ME382 data book. Answer all questions. Show all calculations (on this exam) for full credit. There are a total of 10 pages to this exam. Use a ruler / straight edge to read from graphs for full credit Name: Section: Honor Pledge:
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2 Question 1 You are part of a design team charged with designing a thin-walled spherical pressure vessel that will have a radius of 2.00 m. The pressure vessel will have to survive 1000 cycles of being pressurized between 4.00 MPa and 0.00 MPa. The pump cannot maintain pressure once there is a leak in the wall of the vessel. Any crack in the pressure vessel may be assumed to originate from the surface and to be semicircular with a radius of a . The mode-I stress intensity factor is given by K I = σπ a , where the stress is the stress normal to the crack. The pressure vessel is to be made out a steel that has a fracture toughness
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This note was uploaded on 05/12/2010 for the course MECHENG 382 taught by Professor Thouless during the Winter '08 term at University of Michigan.

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Midtem+II_F-07_ - ME 382 Fall 2007 Mid-term 2 Monday,...

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