Transcription of Thick Walled Cylinders - UW Courses Web Server
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Thick Walled Cylinders - UW Courses Web Server
Thick Walled CylindersConsider a Thick Walled cylinder with open ends as shown above. It is loaded by internal pressure Piand external pressure Poas seen below. It has inner radius riand outer radius r r r+ d rNow consider and element at radius r and defined by an angle increment d and a radial increment dr. By circular symmetry, the stresses and rare functions of r only, not and the shear stress on the element must be zero. For an element of unit thickness, radial force equilibrium gives:Ignoring second order terms gives:Assuming that there are no body forces.()()drdrdddrrdrrr +=++)1(0 LLL=++rdrdrr aba b cdc d Now consider strains in the element. By symmetry there is no displacement v. there is only a radial displacement u given by line aa.
Thick cylinder stresses-1500-1000-500 0 500 1000 1500 2000 2500 2 2.5 3 3.5 4 Radius - in st r e ss-psi Circum. Radial Axial VonMises Example of cylinder with P
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