1. Dynamic axial crush response of circular honeycombs by Royan J. D'Mello, Sophia Guntupalli, Lucas R. Hansen, and Anthony M. Waas Proceedings A Volume ():rspa20110722 May 23, 2012 ©2012 by The Royal Society

2. Diagram of the 3-cell and 7-cell circular polycarbonate honeycombs. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

3. Micro-section of the contact site of two cells in the polycarbonate honeycombs as seen under an optical microscope. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

4. Schematic showing the experimental set-up of the wave loading device (WLD). Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

5. Typical rest–ramp displacement of the incident bar at the specimen end. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

6. Plot showing the initial deformation response of the 3-cell specimen under dynamic crush loading using the WLD method. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

7. Images of the initial stages of deformation in a 3-cell specimen loaded in the WLD set-up from t=0 to t=0.2 ms. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

8. Plot showing the initial deformation response of the 7-cell specimen under dynamic crush loading using the WLD set-up. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

9. Images of the initial stages of deformation in a 7-cell specimen loaded in the WLD setup from t=0 to t=0.2 ms. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

10. Schematic showing the set-up for the direct impact method (DIM). Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

11. Load–time plot of the 3-cell specimen when impacted directly by the striker bar. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

12. Load–time plot of a 3-cell specimen when directly impacted by a striker bar. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

13. Load–time plot of a 7-cell specimen when directly impacted by a striker bar. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

14. Diagram showing the boundary conditions used on the honeycomb during eigenbuckling analysis. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

15. Eigenmodes for 3-cell and 7-cell specimens that are chosen to perturb the mesh for explicit FE simulations. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

16. The rate-dependent compressive behaviour of polycarbonate taken from Mulliken & Boyce (2006). Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

17. Images from the FE dynamic crush simulation of 3-cell and 7-cell models with WLD inputs. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

18. (a) Load–time plot obtained from the FE simulations (WLD method) of 7-cell honeycombs of varying amounts of geometrical imperfections. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

19. Images from the FE dynamic crush simulation of 3-cell and 7-cell models with loading velocity 5000 mm s−1 (DIM simulation). Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

20. Load–time plot (shown on the left-hand axix) obtained from the FE simulation for the 7-cell honeycomb model with varying amounts of geometrical imperfections being crushed at the rate of 5000 mm s−1 (DIM simulation). Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

21. Plot showing the variation of material strain rate and normalized plateau load per cell with crush velocity for 3-cell and 7-cell models. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society

22. Plot showing the FE-simulated crush and peak load values that are normalized by number of cells for 3-cell, 4-cell, 7-cell, 13-cell and 19-cell specimens. Royan J. D'Mello et al. Proc. R. Soc. A doi:10.1098/rspa.2011.0722 ©2012 by The Royal Society