Simulating the effects of a high explosive pressure wave on the Leopard 1's fighting compartment. The model investigates how the blast wave propagates through the tank and determines how lethal it is by measuring the overpressure inside the vehicle.
The HE projectile has over 3kg of TNT and can penetrate around 40mm of steel; in this simulation the projectile detonates above the hull and turret roofs, where the armour is thinnest. The shrapnel from the HE round is ignored for simplicity, and to purely focus on the pressure effects.
To Note:
The small regions of pressure which develop around the rigid body, or in some cases where the pressure penetrates the rigid bodies are due to the air elements being on both sides of the rigid body at once -this is because the elements aren't small enough. These larger elements also cause instability in the model which caused it to crash, hence why some of the simulations are cut short. This could not be improved as I had already reached the node limit of the software I was using.
Credit for Leopard 1 in thumbnail: @TanksEncyclopediaYT
Material properties, armour, and projectile geometries were all taken from literature:
[1] RHA: core.ac.uk/download/pdf/28829...
[2] Air & TNT: osf.io/f8awq/download/?versio...
[3] 3OF19 Geometry: en.wikipedia.org/wiki/125_mm_...
[4] Leopard 1 Armour: www.tankarchives.ca/2016/07/le...
This real-world overpressure effect has recently been implemented into the video game Warthunder...but not very accurately.
Abaqus FEA was used with a Coupled Eulerian-Lagrangian model, with Johnson-Cook material properties for steel, ideal gas for air, and JWL for TNT.
17 июн 2021
