On the compression of aluminium foam structures under shock

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • External authors:
  • David Townsend
  • Samuel Parry
  • D.C. Wood
  • G J Appleby-Thomas
  • Amjad Hameed

Abstract

Foam-based materials have an important role as both blast and impact mitigators, with their extended sub-surface structures providing multiple redundant routes for load management and distribution in the event of failure. In order to further elucidate underlying stress management mechanisms at high strain-rates, here, open cell and closed cell Aluminium were investigated via the plate-impact technique. These experiments allowed the material to be loaded under a macroscale one-dimensional state of strain. The nature of pore collapse was monitored via manganin stress gauges at the target rear surface, with resultant data related back to changes in microstructure via microstructural analysis of both un-impacted and recovered target material. Results indicated crushing of the open cell foam occurred without retarding the flyer plate and the observed shock pressures suggested the degree of compaction increased with impact velocity. The higher density closed cell foam caused significant deceleration of the flyer plate during passage through the specimen and significantly lower shock pressures were observed at the anvil compared to the open cell material.

Bibliographical metadata

Original languageEnglish
Title of host publicationSHOCK COMPRESSION OF CONDENSED MATTER - 2015
Subtitle of host publicationProceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
Volume1793
DOIs
Publication statusPublished - 13 Jan 2017