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Supported by . NSTX Centerstack Upgrade Project Meeting P. Titus November 2 2011. This Looks OK . Downward Component of the Force adds bending stress to the plates and welds. Can this offset be reduced?. Plate Element Model. Plate Element Model Displacements +/- .128e-3.

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  1. Supported by NSTX Centerstack Upgrade Project Meeting P. Titus November 2 2011

  2. This Looks OK Downward Component of the Force adds bending stress to the plates and welds Can this offset be reduced?

  3. Plate Element Model

  4. Plate Element Model Displacements +/- .128e-3

  5. Solid 45 Model – 4 Elements in Thickness Displacements +/- .133e-3 Plate Element Model Displacements +/- .128e-3

  6. Solid 45 Wedge Model 1 Element in Thickness Solid 45 Model – 4 Elements in Thickness Displacements +/- .133e-3 Plate Element Model Displacements +/- .128e-3

  7. Solid 45 Wedge Model- 1 Element in Thickness Displacements +.267e-4 - .804e-4 Solid 45 Model – 4 Elements in Thickness Displacements +/- .133e-3 Plate Element Model Displacements +/- .128e-3

  8. Early: Toroidal Peaking Factor (TPF) of 2.0 400 kA Halo Static, Next Art looked at Inductive plus resistive re-distribution Mid Plane TPF = 1.05, Input TPF = 2.0 Art Updated Cal after Consultation with Stefan Gerhardt Peaking factor was a function of Halo fraction – basically TPF = 1.35 Now TPF = 1.35 at Mid Planeof Casing = Mid Plane Peaking Factor Must Be 1.6 at Strike Points Base Moment was 69,000 N-m Now Nbase Moment is 135 N-m

  9. Was Cantelevered from Here

  10. Insert Shims in this Gap

  11. Stress in the G-10 Crown and Helicoil Inserts Areas of G-10 and TF Flags Due to PF1A&B+OH Vertical Force + Halo Loads Ali Zolfaghari

  12. Added 12000lbs or 53270 N to the existing OOP torque and thermal expansion moment and bolt pretension.

  13. This is the upper crown. The lower crown has even 50% larger tongue thickness A section through the crown piece.

  14. This is the upper crown. The lower crown has even 50% larger tongue thickness Shear Stress

  15. Lower CS-Skirt/OH-Cage/TF_Flag Area G-10 This bolt is threaded into a helicoil insert into G-10.

  16. 12000 lb. pull force

  17. Section through the bolt G-10 shear stress below 75 MPa allowable for threads G-10 stress intensity below 150 MPa allowable

  18. Deformation

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