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Matthew Fox Week 2: January 25 th , 2007. Structures Group Material Selection / CAD Transfer Vehicle, Mars Crawler, Construction Crane, Ares V, ISPP. Material Selection. Traditional Spacecraft (S/C) Materials Al Alloys, Ti Alloys Current S/C Material Al-Li Alloys Future S/C Materials
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Matthew FoxWeek 2: January 25th, 2007 Structures Group Material Selection / CAD Transfer Vehicle, Mars Crawler, Construction Crane, Ares V, ISPP
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)
Material Application: Pressure Vessels • Pressure vessels include: • -Fuel Tanks, Habitat, Transfer Vehicle (Crew Compartment) Al- Li Alloys currently used in External Tank (Code partially generated by Brandon Anderson) Preliminary Analysis: Only considered internal pressure as design criteria, future results can result in larger values.
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
Pressure Vessel Equations Longitudinal Stress Hoop Stress Von Mises Criterion Solve for Min. Thickness
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.