AAE 450 Spring 2008 Molly Kane February 14, 2008 Structures Group Analysis of Unpressurized External Structure

AAE 450 Spring 2008 Unpressurized Conical Shells Structures Group Nose cone Third Stage (Pressurized) Skirt 2 (Unpressurized) Second Stage (Pressurized) Skirt 1 (Unpressurized) Stage 1 (Pressurized)

AAE 450 Spring 2008 Future Work  Working with MAT data, affects of stringers and support rings on critical values Structures Group steel titanium aluminum

AAE 450 Spring 2008 References  Weingarten, V.I., Seide, P., Buckling of Thin-Walled Truncated Cones – NASA Space Vehicle Design Criteria (Structures), National Aeronautics and Space Administration, September Structures Group

5 Critical Pressure – Axial Compression Structures Group = correlation factor to account for difference between classical theory and predicted instability loads E = Young’s modulus α = semivertex angle of cone ν = Poisson’s ratio t = thickness Slide by: Jessica Schoenbauer

6 Critical Moment - Bending Structures Group = correlation factor to account for difference between classical theory and predicted instability loads E = Young’s modulus α = semivertex angle of cone ν = Poisson’s ratio t = thickness r 1 = radius of small end of cone Slide by: Jessica Schoenbauer

7 Uniform Hydrostatic Pressure Pressure: Structures Group = correlation factor to account for difference between classical theory and predicted instability loads E = Young’s modulus t = thickness L = slant length of cone t = thickness Slide by: Jessica Schoenbauer

8 Torsion Structures Group = correlation factor to account for difference between classical theory and predicted instability loads E = Young’s modulus ν = Poisson’s ratio t = thickness l = axial length of cone t = thickness Slide by: Jessica Schoenbauer