Mechanical Testing Engineering Department EN Mechanical Materials Engineering

Mechanical Testing Engineering Department (EN) Mechanical & Materials Engineering Group (MME) A. Gerardin, M. Guinchard 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 2

Introduction f f d d CERN People d “ The mandate of the Mechanical Measurement Laboratory is to provide support for the technical infrastructure of CERN, accelerators and experiments. The laboratory consists of a very complete equipment which permits a very large range of mechanical tests “In-situ” at ambient / cryogenic temperatures and in magnetic fields 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 3

Test Equipments Displacement Transducers Vibration Sensors Vibrometers (wo contact) Load / Tensile Sensors Strain Gauges Optical / Resistive Calibration tools Static and Dynamic Acquisition System Post-Processing and Analysis Parameters measured : Force , Stress, Strain, displacement, vibrations, temperature, etc. . . Environmental conditions : Magnetic field, cryogenic temperature, radiation 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 4

Test Equipments UTS 200 k. N, Frame: 250 k. N Load cells: 200 k. N, 20 k. N, 1 k. N - Tensile (RT down to 4. 2 K) Compression, Flexion, Shear, Fatigue (RT down to 77 K) Extensometer clip-on (class 0. 5) Regulation: Force, displacement, strain ZPM 500 -1000, 1 k. N ZWICK 400 k. N Load cell: I k. N Load cells: 400 k. N, 1 k. N - Compression, Flexion, fatigue (RT down to 77 K) Tensile (RT) Shear (RT) LCF (Low Cycle Fatigue, RT) Regulation: Displacement 9/25/2020 Regulation: Force, displacement, strain Review of possible exchange between Hydros. ch and CERN-EN-MME 5

CERN Applications Ø Mechanical support for LHCb vacuum chamber (C fibre tubes) Ø Mechanical stabilizer for ATLAS IBL (C fibre laminates). Ø Mechanical staves for ATLAS Inner Detector Ø Experimental Stress Analysis for satellite Ø Fiber Optical Sensor (FOS) at CERN 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 6

Supports for LHCb vacuum chamber 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 7

Support for LHCb vacuum chamber �C � fibre description: Filament winding carbon fibre reinforced epoxy tubes � Dimensions: 14 mm ID, 17 mm OD � Fibres volume fraction: 60 % � Layout : [+-8 °/90 °/+-8 °] � Fibres types: 8° orientation: Toray M 46 J 90 ° orientation: T 700 � Epoxy � Tensile resin: UF 3325 TCR and Creep Tests: 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 8

ATLAS Experiment : Pixel Detector 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 9

ATLAS Experiment : Pixel Detector 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 10

ATLAS Experiment : Pixel Detector � Description: � Carbon fibre Omega � 3 plies (K 13 C/RS 3) pre-preg fabric � Layout [0° / 90° / 0°] � Test performed to characterize assembly: � Peel test � Double lap shear tests 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 11

ATLAS Experiment : Pixel Detector � Experimental modal analysis: Experimental results @176 Hz Simulation results @227 Hz 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 12

ATLAS Experiment : Inner Detector � Experimental modal analysis: Part 1 – M 55 J (without fiber carbon crossed ) Mode Shape Frequency Damping Bending Mode@1 33. 6 Hz 0. 90 % Bending Mode@2 93. 6 Hz 0. 30% Bending Mode@3 176 Hz 0. 27% Bending Mode@4 290 Hz 0. 24% Part 2 – T 300 (with fiber carbon crossed ) Bending Mode@1 Bending Mode@2 Bending Mode@3 Bending Mode@4 9/25/2020 21. 5 Hz 60. 5 Hz 119 Hz 201 Hz Review of possible exchange between Hydros. ch and CERN-EN-MME 1. 70% 1. 30% 1. 10% 0. 50% 13

Stress analysis for POLAR detectors in satellite Carbon Socket Bi-axial gauges Scintillator bars Rosette gauges 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 14

Stress analysis for POLAR detectors in satellite Dislocation effect at 35 C for the polystyrene scintillator bars 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 15

FOS for mechanical measurements ? � � FOS applications for our lab : � Strain measurements for CERN Wide and CERN Conditions; � Civil engineering monitoring ; � Fatigue measurements on rotational machine; FOS advantages : � Electromagnetic field immunity ; � Cables reduction ; � Very long distance measurements ; � High number of FOS on the same fiber ; FOS disadvantages : � High number of FOS on the same fiber ; � Delicate fibers in our heavy environmental conditions ; � Length and radius limitations, price ; � Strain and temperature coupling effects ; Lab experience with FOS � Validation tests on tensile specimens for several temperatures (293 K, 77 K, and 4. 2 K) ; � First experience on real structure (Prototype magnet) at cryogenic temperature ; � Collaboration with ITER about mechanical measurements techniques in this field. 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 16

Our FOS experience � Installation procedure (Fiber directly on the support) FOS Selection Surface preparation and cleaning Single Mode Fiber coated with an outer diameter of 200 m - HBM Gmb. H Company with K=0. 78 +/ - 2% Polishing of the surface and cleaning with phosphoric-acid and ammonia-based liquid Fiber cleaning Cleaning with the same chemical products Fibre installation with tape Installation with Mylar tape without groove Gluing Bonding with epoxy-phenolic adhesive for a large range of temperature Mechanical pressure on the fibres Curing under mechanical load control to polymerized the glue Curing, 120°C, 5 hours 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 17

Our FOS experience � Installation procedure (Fiber directly on the support) 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 18

Our FOS experience � Validation tests at several temperatures (down to -271 C) 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 19

FOS & Electrical Strain Gauges Optical sensors Standard instrumentation DI 405 4 Channels Fs up to 1000 Hz 1510 nm up to 1590 nm 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 20

Conclusion � Our mandate : “ The mandate of the Mechanical Measurement Laboratory is to provide support for the technical infrastructure of CERN, accelerators and experiments or outside CERN through KT contract. The laboratory consists of a very complete equipment which permits a very large range of mechanical tests “In-situ” at ambient / cryogenic temperatures and in magnetic fields � Collaboration : 9/25/2020 Review of possible exchange between Hydros. ch and CERN-EN-MME 21