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

1 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

2 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)

3 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 2090- T86Al-Li 8090 MMC SiC/6061 Al MMC SiC/TiC-C Comp. Trans. Vehicle.67.80.67.8.22.20.502 LOX Tank1.72.01.72.1.56.501.3 LH2 Tank2.32.62.22.8.681.41.7 Preliminary Mass Estimation (kg) Trans. Vehicle475341.952 LOX Tank490544437543 LH2 Tank650736580721 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)

4 AAE450 Senior Spacecraft Design Backup Slides

5 AAE450 Senior Spacecraft Design Material Data MaterialAl 7075-T6Al 2024 Al-Li 2090- T86Al-Li 8090 MMC SiC/ 6061 AlMMC SiC/TiC-C Comp. Density (g/cc)2.812.782.592.542.843.861.65 E (Gpa)71.772.47677193 150 Tensile Yield Strength (Mpa)50344052041015501725700 Specific Modulus25.526.029.330.368.050.090.9 Specific Strength179.0158.3200.8161.4545.8446.9424.2

6 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

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

8 AAE450 Senior Spacecraft Design References www.matweb.com http://en.wikipedia.org/wiki/Space_Shuttle_external_tank Rawal, Suraj. Metal-Matrix Composites for Space Applications. JOM 53(4) (2001). Pp.14-17 http://www.answers.com/topic/space-shuttle-external-tank Project Legend, Purdue University Spring 2005. Koczak, Michael. Metal- Matrix Composites for Ground Vehicle, Aerospace, and Industrial Applications.

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