LHQ Curing Mold Simulation Analysis

Miao Yu

Fermilab

08/02/2011

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LHQ Lamination Cross-section

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Loading Sequence

Assumption: 1. pmandrel ~1.4 MPa & pcoil ~20 MPa just close the

mold.2. Once the mold is close, all the increased

pressure from the main cylinder is applied on the mold, pmold

• The maximum mandrel cylinder pressure is 15 tons (10,000 psi), which provides pmandrel 11 MPa on the mandrel block.• The maximum main cylinder pressure is 200 tons (10,000 psi), which provides pcoil 20 MPa on the coil and pmold 84 MPa on the mold.

•Steel 1050 annealed: σy = 365 MPaFs = 3, σallowable = σy/ Fs = 121 MPa

pmandrel pcoil

pmold

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LHQ: Maximum Pressure on the Mold

pmandrel: 1.4 MPa, pcoil: 20 MPa, pmold: 84 MPa

σmax = 290 MPadmax = 99.3 µm

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LHQ: Allowable Pressure on the Mold

pmandrel: 1.4 MPa, pcoil: 20 MPa, pmold: 35 MPa

σmax = 118 MPadmax = 44.1 µm

Main cylinder: 1015+ 3746 = 4761 psi

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LQ: Maximum Pressure on the Mold

pmandrel: 1.4 MPa, pcoil: 24.5 MPa, pmold: 86.4 MPa

σmax = 250 MPadmax = 99.0 µm

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LQ: Allowable Pressure on the Mold

pmandrel: 1.4 MPa, pcoil: 24.5 MPa, pmold: 40 MPa

σmax = 119 MPadmax = 48.0 µm

Main cylinder: 750+4282= 5032 psi

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HQ: Maximum Pressure on the Mold

pmandrel: 0.4 MPa, pcoil: 19.5 MPa, pmold: 282 MPa

σmax = 296 MPadmax = 112 µm

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HQ: Allowable Pressure on the Mold

pmandrel: 0.4 MPa, pcoil: 19.5 MPa, pmold: 115 MPa

σmax = 119 MPadmax = 48.5 µm

Main cylinder: 2500+3052= 5552 psi

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Main Cylinder Allowable Operation Pressure

Pressureon Coil (MPa)

Pressure on Mold (MPa)

Main Cylinder Pressure (psi)

LQ 24.5 40 5000

HQ 19.5 100 5500

LHQ 20 35 4750

• To operate the curing press safely for LQ and HQ, the main cylinder pressure is suggested below the number in the above table. • For LHQ, after the pressure on coil is known to close the cavity, the allowable main cylinder pressure can be re-calculated.