H j MJ *w< NASA Technical Memorandum 4290 Combined Compressive and Shear Buckling Analysis of Hypersonic Aircraft Structural Sandwich Panels %WNEWM«BM(«Mü - ^- •-- ' • • p'UMiC rc.A<"'Ci'Ci J William L. Ko and Raymond H. Jackson MAY 1991 5 NASA PLAST!"'" ARCC \}\ rrr.n ! xJO