thermo-mechanical analysis of airplane carbon-carbon composite brakes using msc.marc z. wolejsza, a....
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Thermo-Mechanical Analysis of Airplane Carbon-Carbon Composite Brakes
Using MSC.MarcZ. Wolejsza, A. Dacko, T. Zawistowski, J.
Osinski
Wheel – Brake Assembly
Tests
Experimental Data
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8
0
100
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M h [daNm ]
F[daN]
t [s]
Braking m oment
Load (pressure)
FE Model for MSC. Marc
• Axisymmetrical thermo-mechanical problem (transient)
• 5 stators + 4 rotors (C/C composite, mechanical and thermal orthotropy)
• Friction-generated heat fluxes input fromuser subroutine
• Partial use of experimental data (eg. friction)• Convection and radiation
FE Model for MSC.Marc
FEA Results
FEA Results
FEA Results
FEA Results
• Pressure distribution along contact line (radiuswise) variation in time
FEA Results
Temperature on second stator Temperature variation in vicinity of piston
Conclusions
• Strong nonuniformity of contact stress• Resulting highly nonuniform temperature
distribution• Clear influence of material orthotropy