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Unformatted text preview: 1 ME 382 Winter 2006 Final Exam Thursday/Wednesday, April 20/26, 2006 This is a closed book exam; students are allowed an unmarked copy of the ME382 data book, but no other notes or books. Answer all questions. Show all calculations for full credit. If you need more paper, staple it to the back of this exam. There are a total of 12 pages to this exam. It is a violation of the honor code to discuss this exam before April 27 t with anyone who has not taken the exam. It is a violation of the honor code to ask anyone about the contents of this exam. Name: Section: Honor Pledge: 2 Question 1 a) At 800 ºC, the creep law of a material is given by ( ) ( ) RT Q n o H o / exp / ~ ~ ! = " " # # & & where n = 4 and Q = 160 kJ/mol, and the uniaxial strain rate is 1.4 x 1014 /s when the uniaxial stress is 500 MPa. Explain very briefly whether you would expect to be able to use this information to calculate the life time of a component at 800 ºC that is subjected to a shear stress of 50 MPa. 3 b) A solid cylindrical rod of radius 20.0 mm and length 600 mm is made of a steel. It is simply supported (by pin joints) at both ends. It supports a point load of 6000 N at a distance of 200 mm from one end. It also transmits a torque of 1000 Nm. Under the service conditions, the rod creeps with a linear multiaxial 1000 Nm....
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This note was uploaded on 09/12/2011 for the course MECHENG 382 taught by Professor Thouless during the Fall '08 term at University of Michigan.
 Fall '08
 Thouless

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