1. Page 1 Stress Analysis Design by analysis : EN 13445-3:2002 Annex C Used tuning analysis model with uniformly thick cavity: Fabrication model is thicker in sharp transition area. Highlights Loads : Gravity + 1.8 bar Pressure, thermal stress(?) Allowable design stress – 50 MPa (≡f) Linearized stress – Equivalent membrane stress + bending stress Criteria General membrane stress ≤ f All examined area pass this condition Local membrane stress ≤ 1.5f Membrane stress + bending stress ≤ 1.5f A few areas exceed but manageable

2. Page 2 Stress Analysis

3. Page 3 Stress Analysis 16 1 2

4. Page 4 Stress Analysis 4 6 7 913 15

5. Page 5 Stress Analysis PathMembrane (MPa)Bending (MPa)Membrane+bending (MPa) 110.51142.48152.91 232.52911.33336.396 331.57324.65949.653 427.92543.31864.581 520.00940.27855.157 617.94641.08456.728 722.80546.51160.928 818.14633.5243.208 912.42476.40281.786 1011.44262.80265.998 1114.4931.12639.771 1210.56142.42249.959 1347.97942.01276.655 1428.74415.97937.551 1549.41455.28393.423 1631.19561.83579.945

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10. Page 10 Stress Analysis - BC A: y fixed B: z fixed C: 2 vertices x fixed

11. Page 11 Stress Analysis - Deformation Undeformed wireframe

12. Page 12 Stress Analysis - Deformation

13. Page 13 Stress Analysis - Deformation