The thermal steady state condition is satisfied when

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Unformatted text preview: n-°C υ = 0.3 k = 3Btu/hr-in-°C Geometric Properties a = 0.1875 inches b = 0.625 inches Loading Ti = -1°C To = 0°C Analysis Assumptions and Modeling Notes The axial length is arbitrary. Two element types are defined so that the same model can be used for the thermal and stress solutions. A radial grid with nonuniform spacing ratio (1:2) is used since the largest rate of change of the thermal gradient occurs at the inner surface. Surface stresses are requested on element 1 and 7 to obtain more accurate axial and hoop stresses at the inner and outer radii. Nodal coupling is used in the static stress analysis. Results Comparison Thermal Analysis Target ANSYS Ratio T,°C (at X = 0.1875 in) -1.0000 -1.0000 1.000 T,°C (at X = 0.2788 in) -0.67037 -0.67061 1.000 T,°C (at X = 0.625 in) 0.0000 0.0000 - Target ANSYS Ratio Stressa, psi (at X = 0.1875 in) 420.42 419.59 0.998 Stresst, psi (at X = 0.1875 in) 420.42 415.00 0.987 Stressa, psi (at X = 0.625 in) -194.58 -195.43 1.004 Stresst, psi (at X = 0.625 in) -194.58 -194.5...
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This note was uploaded on 12/09/2010 for the course DEPARTMENT E301 taught by Professor Kulasinghe during the Spring '09 term at University of Peradeniya.

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