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Performance of sandwich cladding with modular truncated square pyramid foldcore under projectile impact

International Journal of Impact Engineering, ISSN: 0734-743X, Vol: 166, Page: 104258
2022
  • 12
    Citations
  • 0
    Usage
  • 7
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    12
    • Citation Indexes
      12
  • Captures
    7

Article Description

In this study, a novel sandwich cladding with modular truncated square pyramid (TSP) folded structures was proposed and its impact mitigation performance was experimentally investigated by using an air cannon testing system. A multi-stage mould pressing technique was applied to achieve efficient mass production of the foldcore. The prepared cladding specimens were impacted by projectiles using an air cannon testing facility. A custom-made measuring system which consists of five individual load cells was placed behind the proposed sandwich cladding to record the transmitted force for evaluation of the impact mitigation performance. Various impact scenarios including different projectile head geometries, different impacting speeds and locations were considered. An aluminium foam sandwich cladding with the same mass was tested as well for comparison. The impact mitigation performances of the cladding were investigated by evaluating and comparing the transmitted impact force histories recorded at different locations. It was demonstrated that the TSP cladding can be a significantly cheaper and effective alternative of aluminum foam cladding for mitigating impact load. Its mitigation is very effective with a uniformly distributed and smaller transmitted force when impacted by flat-head projectile on the TSP cell, but is less effective under point impact where the impact location is in between the TSP cells.

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