Strength Tests on Paper Cylinder in Compression, Bending and Shear (1931)
NASA Technical Reports Server (NTRS) · leaf 19
N.A.C.A. Technical Note No.370 Figs.12,13 Fig.12 Models AA,BB,0C,X and Y after pure bending test. Left side. i Fig.13 Models AA,BB,CC,X and Y after pure bending test. Right side.
NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.