1. AAE 450 Spring 2008 Steven (“CJ”) Hiu 03/27/2008 “Thank You For The Memories” MAT & FAM Coder – Structures Composite Tanks Analysis CAD – Tanks, Intertank Couplers, Assembly Views

2. Structures main code – tanks.m Propellant Type Propellant Mass Tank Material Max g loading Calculate Dimensions to hold propellant volume Spherical Tank? L/D > 3? Inter- Tank Analysis Add hoops and/or increment thickness Calculate stage mass Tank Buckling & Bending Aerodynamic Loads Inter- stage Skirt Analysis Add hoops and/or increment thickness Add stringers/hoops NO YES NO FAIL PASS COST, Dimensions, Mass PASS FAIL PASS Prop Code (in MAT)

3. AAE 450 Spring 2008 Strength Increase – Pressurized Monocoque  Flight pressure-stabilized design  17% increase in tank strength vs. axial buckling  30-40% increase in tank strength vs. bending Structures Increase in axial buckling strength versus tank internal pressure and dimensions

4. Acknowledgements  Kevin Kloster, John Tsohas for help and advice  Alan Schwing for tireless dedication “He’s like some kind of…non- giving up…school guy!” – Bart Simpson  Brandon White for filling up gaps and much beer  All MAT coders, especially Danielle Yaple, the Borg Queen  Everyone on the team – you’ve made it a great semester despite the blood, sweat and tears (manly, manly tears). AAE 450 Spring 2008 Structures

5. Backup Slide 1 – Carbon Fiber Analysis Structures  Metallic stress Carbon stress metallic lining carbon fiber sleeve P contact P Image: Hiu

6. Backup Slide 2 AAE 450 Spring 2008 Structures Nose Cone 3 rd Stage Propellant Tank 3 rd Stage Engine 2 nd Stage Avionics Inter-stage Skirt 2 nd Stage Propellant Tank 2 nd Stage Engine 2 nd Stage LITVC Tank Inter-stage Skirt 1 st Stage Pressurant Tank 1 st Stage Oxidizer Tank 1 st Stage Fuel Tank 1 st Stage Engine Inter-tank Coupler 1 st Stage Avionics Spin Table Image: Hiu, Donahue, Hinton, Doyle, White

7. AAE 450 Spring 2008 Backup Slide 3 AAE 450 Spring 2008 Structures Image: Hiu