AAE450 Senior Spacecraft Design Matthew Fox Week 2: January 25 th, 2007 Structures Group Material Selection / CAD Transfer Vehicle, Mars Crawler, Construction.

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Presentation transcript:

AAE450 Senior Spacecraft Design Matthew Fox Week 2: January 25 th, 2007 Structures Group Material Selection / CAD Transfer Vehicle, Mars Crawler, Construction Crane, Ares V, ISPP

AAE450 Senior Spacecraft Design Material Selection Traditional Spacecraft (S/C) Materials –Al Alloys, Ti Alloys Current S/C Material –Al-Li Alloys Future S/C Materials –Metal-Matrix Composites (MMC) –Carbon Reinforced Composites (CRFC)

AAE450 Senior Spacecraft Design Material Application: Pressure Vessels Pressure vessels include: -Fuel Tanks, Habitat, Transfer Vehicle (Crew Compartment) Min. Wall Thickness (mm) MaterialAl 7075-T6Al 2024Al-Li T86Al-Li 8090 MMC SiC/6061 Al MMC SiC/TiC-C Comp. Trans. Vehicle LOX Tank LH2 Tank Preliminary Mass Estimation (kg) Trans. Vehicle LOX Tank LH2 Tank Al- Li Alloys currently used in External Tank Preliminary Analysis: Only considered internal pressure as design criteria, future results can result in larger values. (Code partially generated by Brandon Anderson)

AAE450 Senior Spacecraft Design Backup Slides

AAE450 Senior Spacecraft Design Material Data MaterialAl 7075-T6Al 2024 Al-Li T86Al-Li 8090 MMC SiC/ 6061 AlMMC SiC/TiC-C Comp. Density (g/cc) E (Gpa) Tensile Yield Strength (Mpa) Specific Modulus Specific Strength

AAE450 Senior Spacecraft Design Pressure Vessel Design Radius = 4 m -Based on cargo dimension of Ares V Length of Habitat / TV = 6 m - Based on Project Legend Length of Fuel Tank = 25 m -Based on cargo dimension of Ares V Fuel Tank Habitat/ TV

AAE450 Senior Spacecraft Design Pressure Vessel Equations Hoop Stress Longitudinal Stress Von Mises Criterion Solve for Min. Thickness

AAE450 Senior Spacecraft Design References Rawal, Suraj. Metal-Matrix Composites for Space Applications. JOM 53(4) (2001). Pp Project Legend, Purdue University Spring Koczak, Michael. Metal- Matrix Composites for Ground Vehicle, Aerospace, and Industrial Applications.