practice-problems-test2

# practice-problems-test2 - Use (A) Soderberg's theory, and...

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CGN 3501 PRACTICE PROBLEMS FOR TEST NO. 2 1. The stress-strain diagram of a structural material is given below. Find the following: (A) Elastic modulus. (B) Johnson’s Apparent Elastic Limit. (C) Yield Strength at 0.2% offset. (D) Modulus of Resilience. (E) Modulus of Toughness. 0 2 4 6 8 10 12 14 16 18 20 STRAIN (10 -3 ) 50 40 30 20 10 0 STRESS (KSI) 2. The S-N diagram of a structural material is shown below. A structural member made of this material is to be subjected to 1,000,000 cycles of cyclic stress of 120 MPa during its design life. What is the maximum magnitude of an additional steady stress that can be put on top of the cyclic load without fracture during its design life?

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Unformatted text preview: Use (A) Soderberg's theory, and (B) Goodmans theory for this problem. 10 10 2 10 3 10 4 10 5 10 6 10 7 300 260 220 180 140 CYCLIC STRESS (MPa) NUMBER OF CYCLES F yield = 320 MPa F ultimate = 360 MPa 3. A steel bar is connected to an aluminum bar as shown below. At 10 C, the stresses in the steel and the aluminum bars are zero. Calculate the stresses in the steel and in the aluminum when the temperature rises to 60 C. The properties of the steel and the aluminum are given below. Steel E s = 30.0 X 10 6 psi s = 11.7 X 10-6 / C Aluminum E al = 10.0 X 10 6 psi al = 22.3 X 10-6 / C 6&quot; 8&quot; Steel Aluminum...
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## This note was uploaded on 05/26/2011 for the course CGN 6505 taught by Professor Mang during the Spring '11 term at University of Florida.

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practice-problems-test2 - Use (A) Soderberg's theory, and...

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