From the same paper as the previous 4 images.
Fig. 15 (a) A lattice stiffened cylinder [34] can be changed into (b) a sandwich structure with lattice cores by the attachment of an inner skin [33]
Ref. 33 is:
33. Fan, H.L., Fang, D.N., Chen, L.M., et al.: Making and testing of a CFRC sandwich cylinder with Kagome cores. Compos. Sci. Technol. 69, 2695–2700 (2009)
Fan, H.L. = Hualin Fan
Ref. 34 is:
34. Kim, T.D.: Fabrication and testing of composite isogrid stiffened cylinder. Compos. Struct. 45, 1–6 (1999)
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