An analysis of rotationally moulded sandwich structure’s repeated impact properties

Abu Saifullah*, Ben Thomas, Robert Cripps, Kamran Tabeshfar, Lei Wang

*Corresponding author for this work

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


Repeated impact properties of fully recyclable rotationally moulded polyethylene (PE) sandwich samples were experimentally investigated in this work. Testing was carried out with an impact force sensor attached drop weight impactor at 20 J to 50 J energy levels. These sandwich structures used in marine, automotive, large tanks and other applications, are susceptible to small damage due to impact events with floating debris, collisions or friction with other vehicles, crafts etc. in their service life which can grow with time and repeated impacts leading to a catastrophic failure. To avoid this unexpected situation, an in-depth understanding of repeated impact properties of this sandwich structure is essential. The repeated impact properties were analysed in terms of impact force-deflection, maximum impact force, impact damage and the total number of repeated impacts needed for sample penetration. A lower impact energy level showed a higher total repeated impact events to penetrate sandwich samples fully. The maximum impact force vs the repeated impact number figure exhibited three different regions which are related to the damage mechanisms of tested rotationally moulded sandwich samples.
Original languageEnglish
Title of host publicationProceedings of the 36th Conference of the Polymer Processing Society
PublisherAIP Publishing
Number of pages6
ISBN (Print)9780735445062
Publication statusPublished - 23 May 2023
Event36th International Conference of the Polymer Processing Society (PPS) - Montreal , Quebec, Canada
Duration: 26 Sept 202129 Sept 2021

Publication series

NameAIP Conference Proceedings
PublisherAmerican Institute of Physics
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference36th International Conference of the Polymer Processing Society (PPS)
Internet address


  • Rotational moulding
  • skin-foam-skin
  • repeated impact
  • damage
  • polyethylene (PE)

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