High rate compaction of aluminium alloy foams

John J Harrigan, Y. C. Hung, Puay Joo Tan, N. K. Bourne, P. J. Withers, Stephen R Reid, J. C. F. Millett, A. M. Milne

Research output: Contribution to conferenceOther

3 Citations (Scopus)

Abstract

The response of aluminium. foams to impact can be categorised according to the impact velocity. Tests have been carried out at a range of impact velocities from quasi-static to velocities approaching the speed of sound in the foam. Various experimental arrangements have been employed including pneumatic launcher tests and plate impact experimants at velocities greater than 1000 m s(-1). The quasi-static compression behaviour was approximately elastic, perfectly-plastic, locking. For static and dynamic compression at low impact velocities the deformation pattern was through the cumulative multiplication of discrete, non-contiguous crush bands. Selected impact tests are presented here for which the impact velocity is less than the velocity of sound, but above a certain critical impact velocity so that the plastic compression occurs in a shock-like manner and the specimens deform by progressive cell crushing. Laboratory X-ray microtomography has been employed to acquire tomographic datasets of aluminium foams before and after tests. The morphology of the underformed foam was used as the input dataset to an Eulerian code. Hydrocode simulations were then carried out on a real microstructure. These simulations provide insight to mechanisms associated with the localization of deformation.

Original languageEnglish
DOIs
Publication statusPublished - 2006

Keywords

  • aluminium foam
  • microtomography
  • plate impact
  • wood

Cite this

Harrigan, J. J., Hung, Y. C., Tan, P. J., Bourne, N. K., Withers, P. J., Reid, S. R., ... Milne, A. M. (2006). High rate compaction of aluminium alloy foams. https://doi.org/10.1063/1.2263613

High rate compaction of aluminium alloy foams. / Harrigan, John J; Hung, Y. C.; Tan, Puay Joo; Bourne, N. K.; Withers, P. J.; Reid, Stephen R; Millett, J. C. F.; Milne, A. M.

2006.

Research output: Contribution to conferenceOther

Harrigan, JJ, Hung, YC, Tan, PJ, Bourne, NK, Withers, PJ, Reid, SR, Millett, JCF & Milne, AM 2006, 'High rate compaction of aluminium alloy foams'. https://doi.org/10.1063/1.2263613
Harrigan JJ, Hung YC, Tan PJ, Bourne NK, Withers PJ, Reid SR et al. High rate compaction of aluminium alloy foams. 2006. https://doi.org/10.1063/1.2263613
Harrigan, John J ; Hung, Y. C. ; Tan, Puay Joo ; Bourne, N. K. ; Withers, P. J. ; Reid, Stephen R ; Millett, J. C. F. ; Milne, A. M. / High rate compaction of aluminium alloy foams.
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AB - The response of aluminium. foams to impact can be categorised according to the impact velocity. Tests have been carried out at a range of impact velocities from quasi-static to velocities approaching the speed of sound in the foam. Various experimental arrangements have been employed including pneumatic launcher tests and plate impact experimants at velocities greater than 1000 m s(-1). The quasi-static compression behaviour was approximately elastic, perfectly-plastic, locking. For static and dynamic compression at low impact velocities the deformation pattern was through the cumulative multiplication of discrete, non-contiguous crush bands. Selected impact tests are presented here for which the impact velocity is less than the velocity of sound, but above a certain critical impact velocity so that the plastic compression occurs in a shock-like manner and the specimens deform by progressive cell crushing. Laboratory X-ray microtomography has been employed to acquire tomographic datasets of aluminium foams before and after tests. The morphology of the underformed foam was used as the input dataset to an Eulerian code. Hydrocode simulations were then carried out on a real microstructure. These simulations provide insight to mechanisms associated with the localization of deformation.

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