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Tungsten HCal : Single Section Analysis

Tungsten HCal : Single Section Analysis. Initial results of improved structural integrity due to Tungsten plates. Model 1 (steel structure only): The Tungsten plates are represented by point masses - ‘dead weight’. Model 2 (both steel structure & the connected Tungsten plates):

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Tungsten HCal : Single Section Analysis

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  1. Tungsten HCal: Single Section Analysis Initial results of improved structural integrity due to Tungsten plates Niall O Cuilleanain (Supervisor: H. Gerwig)

  2. Model 1 (steel structure only): The Tungsten plates are represented by point masses - ‘dead weight’. Model 2 (both steel structure & the connected Tungsten plates): Here we see a symmetrical half of a module of the Tungsten HCal. Both models are supported at the section’s external face (3 or 9 o’clock position), and under Standard Gravity. Niall O Cuilleanain (Supervisor: H. Gerwig)

  3. Model 1 Niall O Cuilleanain (Supervisor: H. Gerwig)

  4. Model 1 -Deformation Max. Total Deformation: 2.97mm Niall O Cuilleanain (Supervisor: H. Gerwig)

  5. Model 2 Niall O Cuilleanain (Supervisor: H. Gerwig)

  6. Model 2 - Deformation Max. Total Deformation: 1.63mm Niall O Cuilleanain (Supervisor: H. Gerwig)

  7. Model 1 v. Model 2  Max. Deformation: 2.97mm Max. Deformation: 1.63mm c. -33% Niall O Cuilleanain (Supervisor: H. Gerwig)

  8. Model 1 Niall O Cuilleanain (Supervisor: H. Gerwig)

  9. Model 1-Equivalent Stress distribution Niall O Cuilleanain (Supervisor: H. Gerwig)

  10. Model 2 Niall O Cuilleanain (Supervisor: H. Gerwig)

  11. Model 2 – Eqv. Stress distribution (plates are ‘hidden’) Niall O Cuilleanain (Supervisor: H. Gerwig)

  12. Model 2 – Eqv. Stress distribution Niall O Cuilleanain (Supervisor: H. Gerwig)

  13. Model 1 v. Model 2  Max. Stress: 169MPa Max Stress: 63MPa c. -63% Niall O Cuilleanain (Supervisor: H. Gerwig)

  14. Conclusions- Main points • The modulus of elasticity of the pure Tungsten plates were underestimated  E=350GPa, as opposed to E= c. 400GPa. • The analyses must be redone with bolted rather than welded connections, which will inherently give smaller reductions. • The presence of the brackets between each plate must be considered. • These are promising initial results. Niall O Cuilleanain (Supervisor: H. Gerwig)

  15. Where next? • After the single section analysis, I wish to compare the 2 models of the entire HCal structure, in order to analyze the reductions given; i.e. Model 1 (including the point masses), and Model 2 (including the actual Tungsten plates), as we have seen here. • How can we improve the structural integrity? Niall O Cuilleanain (Supervisor: H. Gerwig)

  16. Other current analyses • Crane support of a single section: -where best to support a single section? -how much does it deform in each case? • Single Tungsten plate (12mm): -what deformations are produced when the plate is supported in different ways & at different points? Niall O Cuilleanain (Supervisor: H. Gerwig)

  17. Other current analyses Entire HCal (Tungsten modeled by point masses): - What deformations and stresses are produced in the HCal? (supported at 3 & 9 o’clock positions) Niall O Cuilleanain (Supervisor: H. Gerwig)

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