Tutorial Three solution 2011

Tutorial Three solution 2011 - Solution for Tutorial Three...

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Unformatted text preview: Solution for Tutorial Three MECH2100, 2010 1 The University of Queensland School of Mechanical & Mining Engineering MECH2100 - Machine Element Design Solution for Tutorial Three 2011 Q1: Answer: C & D Q2 & Q3: 4 2 2 7 4 2 D Cross sectional area of the rod A= 30 mm , I = 6.36172(10 ) m , J=2I. 64 F 12000 Axial stress: = 4.244132699 MPa (for all points) A (30) Bending stress: axial bending and Mc I - = = = = 7 12000(0.025)(0.03) 14.1471175 MPa 6.36172(10 ) (tension for points C & D, compression for points A & F) 120(0.03) Torsion stress: 2.8294 MP 2( ) torsion Tc J I - = = = = = a (for all points) Please note all points experience biaxial stresses. For points C & D: y 4.244 14.1471175 18.39125 MPa 2.829 MPa x axial bending xy = + = + = = = 2 1 2 2 1 2 1 2 max & [ ] 14.85447 15.12146 MPa 2 2 18.81658 MPa [answer] 0.425329 MPa 9.620954 MPa [answer] x y x y xy +- = + = = = = Q4: In the maximum normal stress theory, failure is expected whenever the maximum tensile...
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Tutorial Three solution 2011 - Solution for Tutorial Three...

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