Dynamic compression of elastic and plastic cellular solids

F. Box, R. Bowman, T. Mullin

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We report the results of an experimental investigation into buckling in elastic and plastic cellular materials under dynamic compression. The buckling instabilities are in the form of a global pattern switch where the square array of circular holes is transformed into a set of orthogonal ellipses. Properties of the instabilities in the elastic and plastic cellular materials are compared and contrasted. The case of the elastic structure is considered as a delayed pitchfork bifurcation. On the other hand, the response of the plastic lattice is complex, and an irreversible global instability is only found above a critical compression rate.
Original languageEnglish
Article number151909
Number of pages4
JournalApplied Physics Letters
Issue number15
Publication statusPublished - 1 Oct 2013


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