Abstract
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 language | English |
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| Article number | 151909 |
| Number of pages | 4 |
| Journal | Applied Physics Letters |
| Volume | 103 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 1 Oct 2013 |