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Annular Target Numerical Modeling Update - Srisharan G. Govindarajan

Annular Target Numerical Modeling Update - Srisharan G. Govindarajan. Problem Description. Assembly with a Recess on the Inner Tube. Numerical Modeling- 2D Model Results. Fig.7. Assembly temperature contour. Fig.6. Radial stress and temperature distribution across the annular assembly.

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Annular Target Numerical Modeling Update - Srisharan G. Govindarajan

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  1. Annular Target Numerical Modeling Update - Srisharan G. Govindarajan

  2. Problem Description Mo-99 July2011 Meeting

  3. Assembly with a Recess on the Inner Tube Mo-99 July2011 Meeting

  4. Numerical Modeling- 2D Model Results Fig.7. Assembly temperature contour Fig.6. Radial stress and temperature distribution across the annular assembly Fig.9. Assembly heat flux (magnitude) contour Fig.8. Coordinate transformation verification Mo-99 July2011 Meeting

  5. Circumferential Results Tube-Tube contact Fig.10. Contact pressure and temperature distribution on the inner surface of the outer tube Fig.11. Radial stress distribution on the inner surface of the outer tube Tube-Tube contact Fig.12. Hoop stress distribution on the inner surface of the outer tube Fig.13. Assembly hoop stress contour Mo-99 July2011 Meeting

  6. Circumferential Results • The contact pressure remains constant throughout the region where the inner tube is in contact with the foil. • The sharp decrease in contact pressures on either side of the tube-tube contact region can be attributed to the separation of the foil from the inner tube (will be explained in slide 8). Tube-Tube contact Fig.14. Contact pressure and temperature distribution on the outer surface of the inner tube • The thermal expansion of the foil , tubes and the separation that occurs will be addressed in the next couple of slides Mo-99 July2011 Meeting

  7. Deformation of the Tubes and Thermal Expansion Fig.15. Superimposed contours of deformed and un-deformed parts involved in the assembly. A solid black contour represents the un-deformed shape . Mo-99 July2011 Meeting

  8. Separation occurs between the parts No Gap at this location Gap between foil and the outer tube Gap between foil and the outer tube Separation transition Separation transition Mo-99 July2011 Meeting

  9. Future work • Perform experiments based on internal, external and interfacial heating . • Conduct parametric studies on the numerical model developed. • Use the experimental results to validate the Abaqus model . • Predict the thermal contact resistance based on the Abaqus data. Mo-99 July2011 Meeting

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