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Shear stress distributions at the coil/wedges and coil/pole interfaces (MQXFA1)---updates Shear stress distributions at the coil/wedges and coil/pole interfaces (MQXFA1)---updates

Shear stress distributions at the coil/wedges and coil/pole interfaces (MQXFA1)---updates - PowerPoint Presentation

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Shear stress distributions at the coil/wedges and coil/pole interfaces (MQXFA1)---updates - PPT Presentation

Heng Pan 672019 H Pan 2 Coilwedges and Coil pole interfaces QXF Coilpole contact Coilwedges contact CP1 Layer 1 coilpole CP2 Layer 2 coilpole CW11 Layer 1 coil block 3 wedge ID: 800330

shear coil 130 interface coil shear interface 130 section straight stress layer pole pan 2019 current mpa nominal stresses

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Slide1

Shear stress distributions at the coil/wedges and coil/pole interfaces (MQXFA1)---updates

Heng Pan

Slide2

6/7/2019

H. Pan

2

Coil/wedges and Coil/ pole interfaces (QXF)

Coil/pole contact

Coil/wedges contact

CP-1: Layer 1, coil/pole

CP-2: Layer 2, coil/pole

CW-11: Layer 1, coil block 3 / wedge

CW-12: Layer 1, coil block 4 / wedge

CW-21: Layer 2, coil block 1 / wedgeCW-22: Layer 2, coil block 2 / wedge

CP-2

CP-1

CW-11

CW-12

CW-21

CW-22

1

2

3

4

Slide3

6/7/2019

H. Pan

3

Axial load and thermal contraction rate

This analysis uses the following material properties provided by Eddie

Holik

.

Axial and azimuthal load in the model is remained same as used in the previous analysis:

206 kN /coil @R.T.; 292 kN @4.2 K(~100% of Fz

; old target, close to MQXFS1c);Azimuthal load is set 640

μm interference (reviewed in “MQXFA1 Assembly & Loading Readiness Review”:https://indico.fnal.gov/conferenceDisplay.py?confId=14044)

Material

E [GPa]

Poisson

ratio

Thermal contraction

coeff

293

K

4.3

K

293 K/4.3K

293 K -> 4.3K

R

θ

Z

Coil

*

20

20

0.3

2.26

e-3

3.86

e-

32.37e-3Pole (Titanium)1301300.31.74e-3Wedge (Al bronze)1101200.33.12e-3

*Note: In the previous analysis, the thermal contraction rate of coil blocks is 3.88e-3 isotropic

Slide4

6/7/2019

H. Pan

4

Shear stresses at interface CP-1 (Straight section)

Coil/pole interface --- Layer 1 CP-1 (straight section)

R.T.

4.2 K

130 T/m

Shear stress at the interface CP-1 averagely is < 5 MPa at nominal current (130 T/m)

Coil center

Coil end

Slide5

6/7/2019

H. Pan

5

Shear stresses at interface CP-2 (Straight section)

Coil/pole interface --- Layer 2 CP-2 (straight section)

R.T.

4.2 K

130 T/m

Shear stress at the interface CP-2 averagely is 4-7 MPa at nominal current (130 T/m)

Coil center

Coil end

Slide6

6/7/2019

H. Pan

6

Shear stresses at interface CW-12 (Straight section)

Coil/pole interface --- Layer 1 CW-12 (straight section)

R.T.

4.2 K

130 T/m

CW-12

Shear stress at the interface CW-12 reduced

from cool-down to nominal current (130 T/m).

The peak shear stress is ~13 MPa at 130

T/m

High shear stress area --- straight section/ end section

Slide7

6/7/2019

H. Pan

7

Shear stresses at interface CW-11 (Straight section)

Coil/pole interface --- Layer 1 CW-11 (straight section)

R.T.

4.2 K

130 T/m

Shear stress at the interface CW-12 reduced to from cool-down to nominal current (130 T/m).

The overall shear stress is ~3 MPa at 130 T/m.

CW-11

Slide8

6/7/2019

H. Pan

8

Shear stresses at interface CW-22 (Straight section)

Coil/pole interface --- Layer 2 CW-22 (straight section)

R.T.

4.2 K

130 T/m

Shear stress at the interface CW-22 reduced to from cool-down to nominal current (130 T/m).

The peak shear stress is ~9 MPa at 130 T/m.

CW-22

Slide9

6/7/2019

H. Pan

9

Shear stresses at interface CW-21 (Straight section)

Coil/pole interface --- Layer 2 CW-21 (straight section)

R.T.

4.2 K

130 T/m

Shear stress at the interface CW-21 reduced to from cool-down to nominal current (130 T/m).

The peak shear stress is ~6 MPa at 130 T/m.

CW-21