Homework_set3 - will cause yield assuming that(i Tresca’s...

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Fall 2011 ME423 Homework set3 (due 9/21, Wednesday) 1. The uniaxial of yield strength of annealed AISI 1015 steel is 386MPa. Estimate the shear stress at first yield in the torsion test for this material using (i) Tresca’s theory and (ii) von Mises’s theory 2. A cylindrical tube of mean radius 1 in and a wall thickness of 0.1 in is subjected to an internal pressure p=300psi and a torque T=2000 lb-in. The end of the tube is closed. Find the safety factor against yielding if the material yields in uniaxial tension at 8 ksi and von Mises’s theory is used. 3. A solid cylindrical shaft is found to yield when subjected to a torque of 5 kNm. An identical shaft is now subjected to a bending moment. Find the value of M that
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Unformatted text preview: will cause yield assuming that (i) Tresca’s theory and (ii) von Mises’s theory of yielding apply. 4. A ceramic rod of diameter 8mm is loaded by an axial compressive force of 80 N and a torque T. Find the value of T at failure if the material satisfies the modified Mohr theory of failure with S t =0.8MPa, S c =2.4MPa. 5. A solid cylindrical shaft is found to fracture when subjected to a torque of 5 kNm. An identical shaft is now subjected to a bending moment M. Find the value of M that will cause fracture assuming that the maximum tensile stress theory of failure applies....
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This document was uploaded on 10/28/2011 for the course MECHANICAL 423 at Michigan State University.

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