Strip Petals: Local supports and prototype tests ? IFIC-Valencia C. Lacasta, C. García, J.V Civera, B. Muñoz, U. Soldevila, P.Bernabeu, R. Marco Strip Petals: Local supports and prototype tests IFIC-Valencia

EC Envelope Substructure #1 Inner Cylinder Support Beam Disks supports Support Frames

EC Envelope Substructure #2 Services Rings Services Channels

Worst place to insert a petal 0.65m 1m 1.4m 0.288m

Worst place to insert a petal 0.288m

Assembly sequence starts!

Disk inserts for petal supports very preliminary concept Assembly sequence #1 Tooling Disk inserts for petal supports very preliminary concept

Assembly sequence #2

Assembly sequence #3

Assembly sequence #4 The tooling could keep this angle constrained very preliminary concept When manual insertion is complicated, the tooling guides the insertion

Assembly sequence #5

Assembly sequence #6

Assembly sequence #7

Assembly sequence #8

Assembly sequence #9

Assembly sequence #10

Tooling removed no additional mass added Assembly sequence #11 Tooling removed no additional mass added

Accessible area for Local Supports 4 inserts as a very preliminary design Not accessible: should allow to slide petal in LS4 LS3 LS2 600mm LS1 200mm

Very simple model to determine LS 34.7 Hz Density: 1604Kg/m3 Efacings: 146GPa Ecore: 25MPa 64.4 Hz Density: 1604Kg/m3 Efacings: 146GPa Ecore: 25MPa 92 Hz 92.9 Hz Density: 1604Kg/m3 Efacings: 146GPa Ecore: 25MPa 65.7 Hz7 Density x2: 3207Kg/m3 Efacings: 146GPa Ecore: 25MPa

Current configuration for LS Constraints Final constraints 3.- Screw Ux, Uy, Uz constr. (Close to cooling connections) 2.- C-channel Ux constr. (disk insert) x y 43.45 Hz Density: 1.604g/cc Efacings: 146GPa Ecore: 25MPa 1.- C-channel Uy, Ux constr. (disk insert)

Petal Local supports C-channel Bolted C-channel

Petal Local supports The structure allows old supports to behave as new concept requires

Thermal Stress; Setup dry air cooled down by copper coil submerged in liquid nitrogen Capacitive non contact displacement sensors Reduced area Coolant from chiller

Thermal Stress; First results Only convection Next steps: - CO2 cooling. - Improve the set-up to cool the air down as much as possible. - Repeat with different configuration for the sensors (over the pipes/opposite side of petal). T_air = 12ºC Convection + cooling pipes (chiller)

Thermal test (H2O-DryAir); results more data available for FEA (H2O and dry air used) well-known properties

Summary: prototypes mechanical tests Carbon Facings K13D2U 0x/90x/0x 0.21mm No Grinded Hcomb sandwich core 9396; Honeycomb to Carbon Facing SS - CO2 cooling pipe OD: 2.8mm ID: 2.2mm CGL; SS Pipe to POCOFoam CGL; POCOFoam to Carbon Facing Top-bottom Aluminum closeouts CF tubes on sides Prototype 2: Carbon Facings K13D2U 0/90/0 0.21mm Grinded Hcomb sandwich core 9396; Honeycomb to Carbon Facing SS - CO2 cooling pipe OD: 2.8mm ID: 2.2mm CGL; SS Pipe to POCOFoam 9396 BN; POCOFoam to Carbon Facing Gaps minimized by extending Hcomb & POCOFoam No CF tubes on sides MODAL ANALYSIS TEST METROLOGY MEASUREMENTS THERMAL STRESS TEST BENDING TEST METROLOGY MEASUREMENTS

Work in Progress FEA: EC Substructure#1