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Quasi-static impact of indented foldcores

By J. M. Gattas and Z. You


A modified planar foldcore geometry was developed by introducing sub-folds into a standard foldcore pattern. It was demonstrated using numerical simulation that the new geometry, deemed the indented foldcore, successfully triggered a high-order travelling hinge line failure mode. This was found to have a much higher and more uniform energy absorption than the plate buckling failure mode seen in a standard foldcore structure. A numerical analysis also established optimum standard and indented geometries with maximum energy absorption. Prototypes were constructed to experimentally validate numerical findings. Prototypes with no visible geometric imperfections displayed the travelling hinge line behaviour as predicted. Prototypes with visibly-buckled plates showed no change in failure mode compared to a standard foldcore, confirming numerical findings that the travelling hinge line failure mode is highly sensitive to geometric imperfections

Topics: Rigid origami, Foldcore, Indented foldcore, Quasi-static impact, 2202 Aerospace Engineering, 2203 Automotive Engineering, 2205 Civil and Structural Engineering, 2210 Mechanical Engineering, 2211 Mechanics of Materials, 2212 Ocean Engineering, 2213 Safety, Risk, Reliability and Quality
Publisher: Pergamon Press
Year: 2014
DOI identifier: 10.1016/j.ijimpeng.2014.06.001
OAI identifier:

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