Clic Vertex Thermal Setup and stave studies 21/10/2013 Francois-Xavier NUIRY Andrea Catinaccio Fernando Duarte Ramos 1 CERN PH/DT/EO

Overview Thermo-mechanical setup progress. Stave prototype: measures and calculations. 2

Set up status 3 Now Installed in the new lab:  153 R 040

Set up read out status 4 The DAQ system is now working for 1 anemometer and one PT1000 temperature sensor: DAQ system (Partially implemented): 1 NI Compact DAQ 9188 (8 slots) 1 NI 9208, 24-bit current input module 2 NI 9219, Universal module, 4 channels, 24 bit, +/-24V Software (Partially implemented): Acquisition with labview. Working quite well! THANKS TO SAMIR A. ! Active systems (Not yet implemented, need new NI module): -Fan (0-10V input) -Heaters (2 times 50mW/cm2)

 1 st prototypes printed in 3D (ABS Plus) - Low quality - Can be used as preliminary tests  Next prototypes could be printed with the new 3D printer of the polymer lab? 5 Stave support status picture -Platform size: 250x250x250 mm; - X and Y plane limited by laser beam diameter (~0.075 –0.300 mm); - Z axis limited by layer thickness - Fast 0.15 mm (25) - Exact 0.1 mm (25,48HTR,BS) - HR 0.05 mm (25,48HTR) (Due to overcuring it should be minimum 3x the layer thickness)

Stave Measure and calculation of the bending stiffness 6 2*0° M55J (0.140mm each) Rohacell IG F as core 1.82mm thick 2*0° M55J (0.140mm each) Rohacell as core ~1.84mm thick Weight for 280mm  3.5g 3.08g 2.77g 1.51g 1.73g *0° M55J (3 and 4mm width) (0.140mm each) Rohacell IG F as core ~1.84mm thick

Stave Measure and calculation of the bending stiffness 7 Test performed: 3 points bending test Standard used: ASTM D Configuration: Loading nose and supports radius: 5mm Support span : 57.6, 108, 140, 160, and 180mm Loading nose speed: 3.07, 10.8, 18.15, 23.7, 30mm/min Test stopped when 2.5N are reached

Stave 4: Full sandwich Measure and calculation of the bending stiffness 8 FEM simulations: (Total thickness = 1.85mm) 3 points bending test Bow due to both longitudinal elastic modulus (Equivalent) and transversal shear modulus (Rohacell) Stave 4 E Rohacell =70MPa FEM Support Span [mm] Flexural stiffness [N/mm] Bending stiffness E*I [*10^5 N.mm^2] E Rohacell =35MPa FEM Support Span [mm] Flexural stiffness [N/mm] Bending stiffness E*I [*10^5 N.mm^2] E Rohacell =? Measures 3 Points tests Flexural stiffness [N/mm] Bending stiffness E*I [*10^5 N.mm^2] For a 160mm span Stiffness=8.7N/mm Analytical calculation 2.87 g 3.5 g (280mm)

Stave 4: Full sandwich Measure and calculation of the bending stiffness 9 FEM simulations: (Total thickness = 1.85mm) 3 points bending test Bow due to both longitudinal elastic modulus (Equivalent) and transversal shear modulus (Rohacell)

Stave 9: Cross bracing Measure and calculation of the flexural stiffness 10 FEM simulations: (Total thickness = 1.82mm) 3 points bending test Analytical calculation not done because section not constant Stave 9 E Rohacell =70MPa FEM Support Span [mm] Flexural stiffness [N/mm] E Rohacell =40MPa FEM Support Span [mm] Flexural stiffness [N/mm] E Rohacell =? Measures 3 Points tests Flexural stiffness [N/mm] g 1.73g (280mm)

Stave 8: Cross bracing Measure and calculation of the flexural stiffness 11 FEM simulations: (Total thickness = 1.84mm) 3 points bending test Analytical calculation not done because section not constant Stave 9 E Rohacell =70MPa FEM Support Span [mm] Flexural stiffness [N/mm] E Rohacell =45MPa FEM Support Span [mm] Flexural stiffness [N/mm] E Rohacell =? Measures 3 Points tests Flexural stiffness [N/mm] g 1.51g (280mm)

Stave Stiffness studies Conclusions 12 For all staves:  The flexural stiffness is decreasing with the support spacing (obvious).  Convergence between measurements and calculations (implication of the transversal shear, and Rohacell E modulus correction) Full sandwich (Stave 4: 2*0° M55J (0.140mm each), Rohacell as core, 1.82mm thick, 2.87g):  The bending stiffness is ~ 16.3*10 5 N.mm 2  The Rohacell E modulus should be around 35MPa  The natural frequency should be around (loaded clamped stave): 314Hz (280mm), 533Hz (215mm) Cross bracing stave (Stave 9: 2*0° M55J (0.140mm each), Rohacell as core, 1.84mm thick, 1.3g):  The equivalent bending stiffness is: ~ 3.15*10 5 N.mm 2  The Rohacell E modulus should be around 40MPa  The natural frequency should be around (loaded clamped stave): 155Hz (280mm), 284Hz (207mm) Cross bracing stave (Stave 8: 2*0° M55J (0.140mm each), Rohacell as core, 1.84mm thick, 1.12g):  The equivalent bending stiffness is: ~ 2.39*10 5 N.mm 2  The Rohacell E modulus should be around 45MPa  The natural frequency should be around (loaded clamped stave): 138Hz (280mm), 240Hz (212mm)

Stave studies Next steps 13 Reception of 3 new staves from Composite Design:  Stave 1 layup: -T800 skin, 3 plies [0°, 90°, 0°] (~0.095mm thick) -Rohacell core 51kg/m 3 -T800 skin, 3 plies [0°, 90°, 0°] (~0.095mm thick) Thickness: ~1.77mmLength: ~280.2mmWidth: ~25.85mmMass: 3.173g  Stave 2 layup: -T800 skin, 3 plies [0°, 90°, 0°] (~0.095mm thick) -Nida Nomex C , density 29kg/m 3 -T800 skin, 3 plies [0°, 90°, 0°] (~0.095mm thick) Thickness: ~1.68mmLength: ~280.2mmWidth: ~ 25.9mmMass: 3.448g  Stave 3 (same as stave 2): Thickness: ~ 1.71mmLength: ~280.2mmWidth: ~26mmMass: 3.505g -Measure of the flexural stiffness -Calculation of the flexural and bending stiffness -Determination of the natural frequency

Short – Mid term strategy Discussions 14 Set up:  Finalisation of the DAQ system (4 anemometers, temperature sensors)  Optimisation of the DAQ system (rigid chassis)  Implementation of the command of active components (Heaters, fan)?  Design and construction of new stave supports?  First tests: -Calibration of the sensors -Elaboration of test protocols (stave orientation, space around the stave, wind speed, presence of heaters, outputs…)  Capacitive sensors order? Staves: next steps:  Going on calculation / measurement comparisons: -Stave torsional measurements? -Study of new designs? -Order of different prepregs? -X0 measurements ?

Set up read out status 15 The DAQ system will be made of: Sensors: Active systems: -Fan (0-10V input) -Heaters (2 times 50mW/cm2) DAQ system: 1 NI Compact DAQ 9188 (8 slots) 1 NI 9208, 24-bit current input module 2 NI 9219, Universal module, 4 channels, 24 bit, +/-24V Software : Acquisition with labview. Stave sensors SensorsNumberRange of useAccuracy Anemometers Schmidt SS / +20m/s+/-1% Temperature sensors PT100 or NTCs 100 / + 50°C+/-0.1°C vibration sensors (Capacitive sensors) ~1TBD

ABS plus material (3D printer PH/DT) 16