HESH vs SLOPED ARMOUR SIMULATION | 105mm High Explosive Squash Head | Armour Penetration Simulation

High-Explosive Squash-Head munitions spread out on contact with a plate before detonating -the angle of the plate will have an effect on how the round deforms, altering how the blast will affect the armour underneath. Upon detonation, shockwaves are sent through the armour, which reflect and superimpose, fracturing the back side of the plate. This generates a significant amount of shrapnel which can incapacitate or damage anyone/anything on the other side of the target.

The HESH round simulated is the 105mm L43A1 projectile, but is similar in principal to most other HESH rounds of all calibres. For the simulation, the explosive filler used was RDX, as there were no material properties available for the RDX/WX mixture used in the actual projectile.

The real-world detonation delay is unknown, so a 'realistic' one was chosen. The 75° plate may not cause detonation in reality. Projectile spin (from rifling) was not included.

Material Properties and Projectile Design from Literature:

The model uses JWL parameters for the RDX, ideal gas for air, and with JC parameters for the metals (including tensile failure). A coupled Eulerian-Lagrangian model was used.

[SYsimulations]

While an angled impact spreads the round out more vertically, it doesn't spread out much below the projectile -overall the area covered seems to be similar to a perpendicular impact, resulting in similar effectiveness

[kiro]

It would be cool to see a simulation of multiple AP shells hitting the same part of the armour one after one

[smackzackback]

I tried to download ANSYS to model these impacts myself. Just about cried once I realized how much has to go into it. I thought it was a simple as model, choose materials, and then choose impact angle and velocity. And now you have even managed to model HESH, that's insane.

[schullerandreas]

Can you model a 183mm HESH shot hitting a BMP1 upper plate and what would really happen to the BMP1 when the fuse kicks in 😂 No, I am not salty at all Gaijin

[Dropbare]

Great to see some HESH simulation. It's a fascinating shell type.

[tumate]

Now I know that a HESH is basicly a large amound of c4 getting on the surface of the tank and then blowing up

[johnyricco]

Because the velocity of these rounds are low, the high trajectory tends to cancel out the sloped angle. It also means HESH has low hit probability against a moving vehicle. There was a friendly fire incident where a Challenger knocked out another one by dropping a HESH on the turret roof when it was stationary.

[ZigzagEnd]

fun fact: HESH was designed to destroy buildings, not tanks, still effective tho.

[dmn]

I'm not into tanks or physics at all but I have to say this is extremely interesting and really entertaining to watch. Learned a lot from this channel. Keep em coming

[mahogany]

0:21
This is my Kingdomcoom, This is my
When you feel my HESH deep inside your tank

[theemissary]

Another great video, thanks.
P.S. 'Barely' penetrated is still probably going to kill the crew or at least ruin their evening plans :/

[mitasrb]

I love these dating advice videos. Thank you!

[stevestruthers]

This video shows why HESH isn't used all that much anymore. However, it's still potentially quite effective for destroying bunkers and other fortified defensive emplacements. It can definitely destroy older tanks like the T54, T55, T62, T64 and do significant damage to T72 and T80 tanks.

But who operates T54 and T55 tanks anymore without reactive armour, if they operate them at all?

[captainfactoid]

Could you do something similar but for a thinner plate. Because I wonder if the higher angles, while having slightly less pen, have a much higher amount if spalling when not at the limit of penetration

[yevanasvetya]

Without a context this would be a fun naughty meme

[MetalX]

huge explosive load filling the room in a thick white volume.

notice how angling does still increase resistance against squash heads.

[sird]

I love watching these simulations and i take them seriously as a science, technology, and military weapons casual enthusiast.




However, forgive me for laughing at the shape of the round.

[ghxbad]

YES i have bern waiting so long for hesh thx for the simulation

[louis]

Is it possible to see multiple shots across a section of armour plate being simulated?

[darkninjacorporation]

Ah yes, the expanding cream squash head shell, Britain’s second favorite ammunition mainly used for making tea