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Sandwich panel subjected to blast wave impact and accelerated fragments
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Faculty of Civil and Transport Engineering, Poznan University of Technology, Poland
Submission date: 2023-10-16
Final revision date: 2023-12-09
Acceptance date: 2024-02-05
Online publication date: 2024-02-11
Publication date: 2024-02-11
Corresponding author
Robert Studziński   

Wydział Inżynierii Lądowej i Transportu, Politechnika Poznańska, Poland
  • Sandwich panels – metallic thin faces, PIR core – have poor antipenetration abilities.
  • Equivalent static load is reliable for global analysis of sandwich panels.
  • The 3-stage FE approach is reliable for investigating an obstacle subjected to blast load.
The article presents sandwich panels subjected to blast wave impact and accelerated fragments. The research discusses results obtained from original experimental setups that fill a gap in the area of investigation of the mechanical response of sandwich panels used in civil engineering applications under accidental design situations such as blast wave impact and/or fragment penetration. In field experiments, a high-speed camera was used to record both the fragment trajectory and the deflection of the sandwich panel. The authors proposed the equivalent static load for both the global analysis of the sandwich panel and the calibration of the numerical model. In FE modelling, CONWEP algorithm was used to simulate blast wave impact, and ductile damage model material to allow perforation of the sandwich panel faces. The convergence of mesh size was analyzed. For the validated numerical model, an evaluation of the effect of the size of the fragment (diameter/mass) on the outlet velocity and the size of the inlet and outlet holes was carried out.
This research was funded by the National Centre for Research and Development. Poland. under the grant DOB BIO10/01/02/2019 within the Defence and Security Programme
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