The 183mm HESH of the FV4005 was designed to knock out any soviet tank of the 40's and 50's with a single hit. The massive 72kg HESH projectile had enough explosive mass to perforate around 75mm of steel, while being able to create spalling through plates exceeding 200mm thick with its shockwave effect.
While it was designed in response to the IS heavy tanks, their design meant that only the scabbing effect would be present, hence a target with an exposed hull roof was chosen to show both the HESH and HE overpressure effects. The simulation represents an impact on the turret cheeks, but to increase accuracy and reduce computational time, the model was made symmetric.
The amazing T54 artwork in the thumbnail is credited to: @Tank Encyclopedia
TO NOTE: The video was broken into 2 simulations to maximise the accuracy of both effects. No diagrams could be found of the L1 hesh so the design used is a scaled up version of the L43A1 HESH projectile. Some shrapnel and fragments are not shown as element deletion is used.
Material properties, armour, and projectile geometries were all taken from literature:
[1] RHA: [ Ссылка ]
[2] Air: [ Ссылка ]
[3] RDX: [ Ссылка ]
[4] L43A1: [ Ссылка ]
[5] T54 Armour: [ Ссылка ]
[6] Lethal Pressure Levels: [ Ссылка ]
Abaqus FEA was used with a Coupled Eulerian-Lagrangian model, with Johnson-Cook material properties for steel, ideal gas for air, and JWL for RDX.
