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Structures

Structures. Curtis Arends Ashley Lantz. Structures Initial Cylinder Material Selection. Curtis Arends. Presentation Outline. Static Buckling Mass Budget Radiation Shielding Conclusions. Thin Wall Buckling Instability. Valid for r/t < 1500 Young’s Modulus proportional to stiffness

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Structures

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  1. Structures Curtis Arends Ashley Lantz

  2. Structures Initial Cylinder Material Selection Curtis Arends

  3. Presentation Outline • Static Buckling • Mass Budget • Radiation Shielding • Conclusions Curtis Arends

  4. Thin Wall Buckling Instability • Valid for r/t < 1500 • Young’s Modulus proportional to stiffness • Desire high specific stiffness • Cylindrical spacecraft shells are common Curtis Arends

  5. Buckling of Monocoque Cylinder Curtis Arends

  6. Current Specific Stiffness 6 cm 5 cm 30 cm + LN Specific Stiffness Curtis Arends

  7. Specific Stiffness Comparison Curtis Arends

  8. Defining Structural Mass Cylinder Nose Cone Curtis Arends

  9. Mass Budget (kg) Curtis Arends

  10. Radiation Shielding Radiation Sources • Van Allen belts, solar radiation and flares, cosmic rays and supernovas Shielding Factors • Duration, material, shield thickness Note: • 0.5 cm aluminum shield for Galileo spacecraft Curtis Arends

  11. Conclusions Al 2024 cylinder • Withstands buckling the best • Provides ~3 kg for payload • Will likely give adequate radiation shielding Note: • Material must still satisfy thermal and dynamic impact constraints Curtis Arends

  12. Questions?

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