An EFP impact in comparison with the IM fragment impact test (Paper) / Comparison between IM fragmen and EFP impact (Presentation)
conference paper
One of the most common threats in the military Out of Area Operations is the IED-EFP against light armoured vehicles, trucks etc. Besides the direct danger to the personnel, a hit of an IED-EFP in a vehicle’s munition bunker will most likely end in a catastrophic event with many casualties. The development of IM munitions is already a major step towards increased munition safety. STANAG 4439 prescribes the tests for munitions to pass in order to be IM. However, the question rises whether the IEDEFP is a different kind of threat than the impact tests described in STANAG 4439, in particular the fragment impact test following STANAG 4496.
In a first attempt to answer this question, TNO carried out an investigation using the TNO high velocity fragment impact test and the simulation tool ANSYS/Autodyn. An IM high velocity fragment impact test result has been compared with a series of simulations on the same munition item. The velocity of the projectile for both cases is around the prescribed 2530 m/s. Another series of simulations has been
performed with 2 different types of EFP’s. To choice of the proper EFP’s for this comparison was based on literature from studies with respect to the shape and velocities of EFP for military use. In this investigation these military EFPs should be seen as a worst case scenario of the IED-EFP with respect to shock impact. The results of this investigation will be presented in this paper.
In a first attempt to answer this question, TNO carried out an investigation using the TNO high velocity fragment impact test and the simulation tool ANSYS/Autodyn. An IM high velocity fragment impact test result has been compared with a series of simulations on the same munition item. The velocity of the projectile for both cases is around the prescribed 2530 m/s. Another series of simulations has been
performed with 2 different types of EFP’s. To choice of the proper EFP’s for this comparison was based on literature from studies with respect to the shape and velocities of EFP for military use. In this investigation these military EFPs should be seen as a worst case scenario of the IED-EFP with respect to shock impact. The results of this investigation will be presented in this paper.
TNO Identifier
460425
Source title
2012 Insensitive Munitions & Energetic Materials Technology Symposium (IMEMTS) "Insensitive Munitions & Energetic Materials Advancement and Their Benefits to the Warfighter", Planet Hollywood Hotel, Las Vegas, NV, USA, 14-17 May 2012 (Event #2550)
Collation
9 p. (Paper) / 41 sheets (Presentation) (Session 7A)