Backwards Ribbed Armor VS Frontal Ribbed Armor

Songs used:
• C418 - Subwoofer Lulla...
• C418 - Sweden - Minec...
• C418 - Sweden, but it'...
Discord: / discord
Program used is ANSYS

[@simulationbros]

Apparently Sweden from Minecraft is copyrighted and I had to re upload... These simulations took up almost 200GB of storage. As an update: NERA armor is not being made due to it exponentially taking more compute time the longer it runs for and the longer it runs for the more likely it is for the project to have an error. This might be solved by changing material properties. I spent almost 100 hours trying to get it done but every time it failed and had an error or took way too long. Still working on making a version 2 of the Yamato simulation with more accurate details.

[@gerfand]

Yeah well its used in Minecraft, its also a bit why C418 has not made new music for it

[@MrPezsgess]

Dude how you didn't know that xD. What was your idea? I'm just curious because I see a lot of people use Terraria music as well for background.

[@peggygawel7244]

It shouldn't be copyrighted mojang and Daniel never had a problem with people using it

[@coreinc.9658]

Daniel(C418) who wrote and produced the song "Sweden" has publicly stated that he is OK with people using his music for KZbin videos and that any copyright claims are false/fake and not made by him. He owns the full rights to his music and Mojang/Microsoft(Owners of minecraft) do not own the rights to his music, therefore cannot copyright claim you. I highly suggest contacting KZbin to get this fixed as after doing some quick research, I found that other people receiving copyright claims for minecraft music on youtube were able to get it resolved no problem. After all, it can easily be proven to be a false claim.

[@gerfand]

@@peggygawel7244 That probably won't stop Mojang from being Scummy

[@mr.waffentrager4400]

Ribbed on both sides...for some reason obviously

[@RedVRCC]

For crew's pleasure

[@chriskola3822]

I can only get so hard.

[@mystifoxtech]

​@@RedVRCC I have a feeling you watch Chris Boden

[@RedVRCC]

@@mystifoxtech who?

[@Arash_Leopard]

ribbed on both sides vs hard ribbed on both sides

[@MegaJani]

Minecraft music with armor penetration simulations is something else man

[@minimaster0328]

This has the same chord progression as get lucky by daft punk and I can't listen to it because of that

[@jmpmp_505]

@@minimaster0328 now i cant unhear it

[@Ekaterinetta]

I know the forst music from ”Surviving Mars”. Kevin McLeod/incompetech?

[@agiliteka]

orchestral Minecraft music goes just as hard as one could imagine

[@chilledburrito]

Well shit now I need to watch this video ASAP.

[@GodEmperorFrog]

ill remember this when i build a tank for sure

[@lordtomlluckrahthegreat9014]

You can use this knowledge to some degree in tank-building games, like Gmod's ACF (or ACE) addon, or "Sproket," the video game.

[@GodEmperorFrog]

@lordtomlluckrahthegreat9014 how about a tank building autoshop? In minecraft ofc

[@lordtomlluckrahthegreat9014]

@@GodEmperorFrog I don't know to what level you can utilise the info in this video in Minecraft. I've seen people make armoured vehicles with Create, but the "armor" (just regular Minecraft blocks, really) in the mod doesn't behave as it does IRL at all, so it'd only be aesthetic. If you were thinking about recreating this in mods that already add armoured vehicles, such as "Flan's Mod," then it still won't be too useful, since you can only build preset tanks in such mods. However, for want of blocks and warfare, a good voxel-based game to try to apply the ribbed armor concept on is "Space Engineers." That game features weapons and modular armor units that can be assembled together like building blocks, much like in Minecraft.

[@Swagmaster07]

@@lordtomlluckrahthegreat9014 I tried getting ACF but it's like very obscure or something, and it isn't that detailed. Only good thing about ACF is very custom tanks. And in Sprocket there is no spall, and you can't make composite armor.

[@thebadlander3608]

Killdozer is back and ready for round two

[@jamieimbusch]

oooooo, someone got a new pc. look how shiney everything looks

[@OptiPopulus]

The armor in the video: Ribbed for his pleasure Vanilla Girthy Ribbed for her pleasure RIBBED for his pleasure

[@theimperfectgod7140]

Bro what 💀

[@breni1518]

​@@theimperfectgod7140 The hole

[@V4N9U15H.]

Mf got armor rating from bad dragon

[@user-73a]

gay

[@Swagmaster07]

Okay wow, in so many of these videos it looks like the shell really didn't pierce, but with that small aluminum plate it really shows.

[@YourLittleMartian]

None of them looked like they pierced because, none of them did. I am in no way, shape, or form, a ballistics expert, however, what you are seeing penetrate the (second) aluminum plate is metal that fractured (originating from the first plate) due to force of impact from the shell. I may be wrong on the terminology, but I believe its referred to as Spall. The shell hits with such incredible force that its shock from the impact flows through the initial plate until it reaches the end (of the initial plate) and depending upon on how much force remains, will determine how much spall is generated. There is much more in-depth explanations about this stuff out, there take a look. I just reached then end of the video, it is indeed spall that is hitting the second plate. If you're bored and find this stuff interesting, over-pressure can be a pretty interesting topic to learn about as well.

[@Swagmaster07]

@@YourLittleMartian I know that it was spalling, by piercing I meant like causing damage. And its just that I imagined spalling being rare, so I thought that perhaps the other balistic videos about armor also had spalling but it wasn't shown. I made a comparison. You are right though.

[@divoulos5758]

Basically coating the inside with kevlar fixes that

[@colbunkmust]

@@Swagmaster07 Spalling is tremendously dangerous to crews of older armored vehicles that don't have an aramid liner on the inside. HESH rounds make extensive use of spalling to kill enemy tanks crews and was the preferred ammo of the British Army tank corps for a long time. A HESH round can hit a tank, cause zero penetration to the armor and still turn the crew into hamburger.

[@markhahn0]

@@divoulos5758 until the spalling is bad enough that the kevlar can't handle it. so then you add a layer of something after the kevlar? it seems like this progression leads to complicated layered armor, and winds up being a space/weight/cost optimization problem (not to mention the realization that a piece of armor might get hit more than once...)

[@aroventalmav888]

I think the geometry of the ribbing is also going to be a key factor. The angles of a rectangular rib are going to catch the shell and direct some of the energy into the base plate. All said, these sorts of sims are neat. Far from absolute, they can give a comparative idea as to how effective an idea might really be.

[@ChickentNug]

Yeah I was wondering if each of the ribs were angled down a little to kind of ramp the shells how much it could help

[@ZalmiMalziFan]

I feel like reversed ribbed armor just increases your chances of dying due to shrapnel

[@ArtietheArchon]

the gun used is ambiguously named here. an Ordnance QF could be a QF 2-pounder all the way to a 32-pounder. an Ordnance QF 20 pounder (84mm) as used on Centurion, firing a full-bore Armour-Piercing Capped Ballistic Capped (APCBC) shell had a muzzle velocity of 1,000 m/s (3,300 ft/s), projectile weight, striking velocity and spin unknown it amuses me we're all autistic enough to know that this is a simulation of various configurations of the Strv-103's frontal armor/engine plates...it would be interesting to see what difference the fence armor would make on full-bore shells

[@matthelord7695]

Its the 3.7 inch AA gun and its not a strv 103 just similar to it

[@VaultHoward]

Please be quiet

[@JForrestFisher--76]

Fence vs solid decapping plate would be cool.

[@memadmax69]

Theres only one thing missing from this simulation that I think is critical: Spin. In real world tests, the shell spinning caused notable damage as well as helping the shell dig into the armor.

[@shiraorihiiro224]

APFSDS almost ignore the edges

[@JosephHarner]

*Pretty* sure there was a CFD sim on a similar channel that showed this had negligeable effect. Can't find the specific example I'm thinking of. Military Simulation Lab had a video showing that at unrealistically high spin rates (300000RPM, >10x a normal projectile), spin actually significantly *reduced* post-penetration projectile velocity, though the added rotational energy from the spin increased debris generation if penetration did occur.

[@kirotheavenger60]

Shell spin rate is such that the shell will travel several metres for every rotation, given the short distance a penetration occurs in the level of spin is pretty negligible

[@Swagmaster07]

Spinning actually gives worse penetration, it only serves to increase accuracy while decreasing some velocity. That is why most modern tanks use Smooth Bore Cannons, they have no spin but are still accurate due to fins.

[@pyrotechnicalbirdman5356]

​@@Swagmaster07the gyroscopic effect of the spin allows more interia to smash against the armor before the armor pushes the shell away, so a little more force.

[@ssocar96]

Hardened rib exterior, flexible spring steel interlocking diagonal rib lattice on the inside. Has to be under slight tension but not enough to completely prevent vibration from a hard impact.

[@ssocar96]

Maybe a thin top plate with spacers above the outer ribs?

[@AakeTraak]

As I understand it, the "bar" is there to prevent small caliber fire from ricocheting and damaging the optics.

[@AnonymAnonym-s4e]

What infantryman fighting an apc fires at the armor and hopes that it ricochets into the optics instead of aiming at the optics???

[@krzysztofrusek9096]

@@AnonymAnonym-s4e Spray and pray?

[@Br1cht]

@@AnonymAnonym-s4e More than you think, the Soviets even had manuals about it during WWII. Even now you can mess up the tankers day by doing it, all about how desperate you are I think.

[@AnonymAnonym-s4e]

@@Br1cht Cmon soviet tactics during ww2 cannot be compared to modern warfare

[@Br1cht]

@@AnonymAnonym-s4e it was one example, the poor Ukrainians had pamphlets about it at the start of the war as well. As I said it’s a desperate move but it will have some effect. Guessing that most rather use a drone but needs must as they say.

[@Redstoneprofi01]

Perfect music 😂 I already knew all of the remixes you used and actually used one of them in a video that i made too, it's just fitting for many things

[@The_Mythical_Potato]

Ribbed, for the crew's pleasure. 💀

[@xVMouseVx]

Ribbed for your protection

[@jesusofbullets]

I'm almost mad that I wasn't the first person to post this. Was literally my first thought seeing the thumbnail.

[@ShawnF6FHellcat]

And now I want to play old versions of Minecraft...

[@Debbiebabe69]

Never bothered with anything after 1.7.10, best version of MC imo.......

[@slizra5765]

Timestamps/summary Ribbed Armour - 0:38 6 penetrations ~73 dents Armour no ribs - 2:27 0 Penetrations ~56 dents Armour with the steel mass of the ribs - 4:18 2 penetrations ~40 dents Reversed ribbed armour - 6:13 1 penetration ~44 dents High hardness ribbed amour - 8:05 Penetrations 0 ~10 dents ❤

[@karstenschuhmann8334]

High hardness ribs and a spaced 15mm spall protection on the inside.

[@eneamechini9356]

3:34 great choice of music man

[@mab9614]

One also needs to consider the armour toughness, the more hard/brittle it is the more easier to create fragmentation.

[@PantherSerpahin]

Which is where the hardness ribs but softer RHA did pretty well Vs shell as the hardness ribs breaks the round up and the RHA below it acts as a small liner I wonder how thinner ribs in a diamond patter would work at that point

[@sibsnake]

captain obvious nerd

[@Pzkpfw-Tiger-Ausf.-B]

That’s why the Soviet tankers loved the American Sherman holes, because they where soft enough that they could take a hit from a German PAK and a chance to not kill the crew from frag

[@Pzkpfw-Tiger-Ausf.-B]

@@sibsnakehe’s saying it for people that don’t know, no need to be an ass

[@sibsnake]

@@Pzkpfw-Tiger-Ausf.-B you two are misguided lmao

[@Scandinavianclips]

The ribbed armor was mainly used on the Swedish Strv 103 and the playing of “Sweden” in the background is fitting.

[@abdulalsalay]

Nice to see the sim videos getting longer, new computer?

[@simulationbros]

Just new stuff in the works.

[@PhilippK-c6g]

3:34 minecraft music for some reason

[@betamiNusDecayLol]

was abt to say that

[@Roadrunner24x]

The minecraft music😂😂😂

[@hypernova3527]

This gave me a question. How would a plate of gradually hardened armor do in this test? In theory, the hardened outside would deflect the round while the softer inside might act as an improvised spall liner.

[@ikoiko5311]

Good work, those two best performing combinations surprised me.

[@fredfinks]

im halfway through video and it doesnt make sense. the initial 50+ rib is penetrated, then 50mm no rib zero pen, then 58.6mm penetrated. maybe 20mm no rib is impervious to a nuke.

[@woehogsghost]

The right angles cause a focus of energy, I think a gentle rolling armor would be useful as it will make different angular velocities as the object drags along it

[@woehogsghost]

how this shape of hardened steel could be achieved is the problem ~~~~

[@woehogsghost]

because it really needs to all be one piece, long explanation why, but just placing hardened strips with a curve on top or adding dragon scales is less effective and ineffective after initial stress

[@woehogsghost]

short explanation, energy harmonics, noncongruent pieces

[@veteranironoutdoors8320]

I’m intrigued as to how alternatively spaced ribs on the outside and inside would do.

[@technoruffles7747]

If i were to hazard a guess. External ribs are to deflect and shatter the projectile while internal ribs would be more to retain structural integrity and likely reduce spalling. Just a guess tho.

[@LiezAllLiez]

Before i even watch this - i think a smooth plate will be able to deflect rounds better than a plate with any irregularities on it. Plainly speaking, not giving an incoming round anything to bite into is better.

[@WatermelonDog202]

I mean it actually is better because anything for the round to hold into would basically stop it's acceleration, and in case the round is HE just place anti explosive equipment on the most vital parts of your tank that have this ribbed armour.

[@WatermelonDog202]

But if you are gonna rib it make it hardened ribs.

[@markhahn0]

the "no bite" sounds like "hard and/or not malleable" but where's the energy going to go? very stiff things also tend to fracture. afaik, that's why traditional approaches involve both trying to break up the projectile, and providing a layer that can absorb a lot of energy (ceramic).

[@jprupp]

Fun fact: the soothing background music from this video was played to the tank crew during these tests.

[@pwnjones]

Now simulate McRib, with and without extra sauce.

[@dylanwallace5571]

THE OG MINECRAFT MUSIC YEEEESSSS

[@B0N3ZNP3WZ]

It's obvious that someone with no forearm experience made this... come on man!

[@Advance493]

Another candidate layout could be ribs sandwiched between 2 half-thickness plates. The top plate ribs would be inward but for the bottom they would be outward, and they would add the benefit of spaced armor.

[@tinkertailor7385]

No ribs, just space the armor to stop the spalling. Take the mass of the ribs, create an armored backing plate and fix it onto the underside of the armor with honeycomb aluminium about 10 mm thick sandwiched between the two plates. No spall with get through and if the frontal armor is crushed onto the backing plate, softer aluminium crushes in between them to slow down energy transfer so there is no spall off the backing plate.

[@sammymartin7891]

This "information" is completely irrelevant if you don't give the caliber weight and velocity of the projectiles.

[@matthelord7695]

Its in the video????

[@yssabellequilas4698]

Minecraft music+armor pen simulation=this masterpiece

[@simonhofrichter2551]

Nice simulations man, what software is this?

[@simulationbros]

ANSYS Explicit Dynamics

[@simonhofrichter2551]

@@simulationbros thx bro

[@markhahn0]

@@simulationbros I'm curious whether there are open-source solutions that could do this kind of work - openfoam maybe? or does commercial software provide a library of reasonable material properties, so your simulation can be more realistic (oops, my parameters for armor are accidentally off by 1e9 and I'm modeling tanks made of butter)

[@liammiller1472]

3:03 the music reminding us that this strv crew isdying

[@teamscarletdevil6915]

probably the engine is dying... the crew compartment has additional 15mm armors inside.

[@sp.v.207]

Thanks i needed to know this

[@richardkrenek985]

I liked the music, but I don’t think I’d want to trust my life to armor that’s likely to sustain a direct hit from ordinances designed to penetrate it. I’m sure it’s great for small arms projectiles and shrapnel. I just found this page and I believe I’m going to subscribe. I’ve already seen some very interesting simulations.

[@DragonsAndDragons777]

Came for armour penetration, stayed for the music

[@TheMr0lolosh]

It was extremely unexpected that the thick armor performed worse.

[@SteveFaver-z2j]

Not really, you'd be very surprised at how much better thin, sloped armour is.😊

[@joehelland1635]

In a similar vien, how does layering the high hardness rib material in a homogenous layer affect the results?

[@saint_alucardwarthunder759]

This music made me feel like I'm watching an anime about a girl dying of cancer

[@ShawnF6FHellcat]

Well... Minecraft does sometimes make you feel an anime girl dying of cancer...

[@saint_alucardwarthunder759]

@@ShawnF6FHellcat I meant the beginning

[@ShawnF6FHellcat]

@@saint_alucardwarthunder759 I honestly forget what the beginning music sounded like, because my brain went on low-power autopilot after cleaning all day...

[@silasannanack6129]

But instead it’s a bullet trying to pierce armour

[@kyleyamada1313]

the beginning is minecraft too lol

[@theapexsurvivor9538]

Now we need a comparison with an additional layer of hardened steel on the front face, as opposed to just hardened ribs.

[@tobilikebacon]

i actually have a very interesting idea: could you compare NERA to SLERA? SLERA is like NERA but with a little explosive inside, so a mix of NERA and ERA.

[@Nick-rs5if]

But what about having ribs both horizontal and vertically aligned on the outside of the armour? Or maybe having a geometric pattern on the inside of the armour as structural support? 🤔

[@xzGAB]

Trying to understand the algorithm bringing me here

[@occho787]

Can you do armor with brisket also?

[@ToxicJelly9]

Underrated comment

[@kaljutamme7468]

This simulation seems to be wrong. There is apsulutely no reasoning why 58mm armor should do worse than 50mm armor. Also hardly questionable is the result of hardend ribs armor outide. It depends very heavily on the fact which part of shell is impacted and therefore shell futhure trajcetory directed. If the front point would impact first that would lead shell turning down and makking penetration much worse. However if the side is touched first then yes it will quide shell away from armor. However as said before gyroscopic effects would have huge effect one that also.

[@VieneLea]

So the ribs basically deflect a lot of energy towards the armor. Gotcha.

[@ThorsMartell]

I have 3 questions: 1: Why always the angle of 69.5°? Is this the most common or average or median impact angle? Shouldn't the armor protect against a variety of angles and munitions? 2: What about layering the armor? 30 + 10 + 10 The splinters from the armor hitting the witness plate have far less penetration power than the original bullet 3: What about hardening the surface? I would use a hard and smooth material for the surface to deflect/spread the impact's engergy and a softer material which can bend w/o breaking underneath to absorb the impact energy.

[@Moondog2A]

This is somewhat counter-intuitive. I would have thought that the ribs at a right angle would "catch" the round and redirect it into the armor. It didn't. But why did the 50mm armor have less penetrations/spalling than the thicker 58mm armor?

[@TWMSR]

What calibre and of what gun is Shot Mk.1 OQF Mk. 2? What velocity?

[@matthelord7695]

QQF Mk 2 is the gun, Shit Mk1 is the shell itself, velocity is around 295m/s if i remember correctly and its a 3.7 inch (94 mm) round

[@connivingkhajiit]

94mm 32 pounder

[@PAcifisti]

​@@matthelord7695is this a shit post or did you just convert the velocity pointlessly? ~300m/s is a howitzer round. This round is more like 1000 m/s

[@sibsnake]

TogGun

[@techpriest5452]

​@@matthelord7695I am genuinely curious about where you got that velocity from?

[@kittengray9232]

Wellenform (wie alte Zeppeline) könnte besten Schutz pro Masse bieten. Auch oben-unten-Rippen orthogonal zueinander könnten gut abschneiden.

[@BartJBols]

Could you add a case with a hardened ribs armour plate with a secondary spaced spalling plate with the same total mass as the hardened ribs plate?

[@evemaniac]

I brought my fine rib underwear with the same physics in mind.

[@КоневАлександр-р4м]

to this music you start to think about the past days of your life. I love you guys)

[@simulationbros]

It makes me think about how beautiful the world is ❤

[@magamed7902]

Would be intresting to see thin layer of hard metal on top of normal plate in comparison to last case, maybee also try 50/50 hard and normal armor combination

[@UnDeaDCyBorg]

I wonder if it'd work to only have the armour with the high hardness ribs attached for the most part, and significantly thinnger in between. Might end up with too high plasticity.

[@martinzhang5533]

It would probably be better if the high hardness steel is just added as a flat sheet on top of the base armor in the last case. Would be interesting as a comparison

[@ccruler]

What about high hardness plate with soft external ribs?

[@Twangaming]

Speaking as a ribbed plate of rolled homogeneous steel, I love spalling

[@betamiNusDecayLol]

ah yes a lullaby playing in the background of a bullet shooting at armour. (it’s the name of the song “subwoofer lullaby”)

[@petersmythe6462]

Re: penetrating 1mm of Al means lethal damage? Ehhhh.. I wouldn't be so sure about that. I've put a hole in an Aluminium ice scoop several times that thick just by putting it down too hard. Aluminium is pretty brittle. Is it easier to punch through 3 mm of Aluminium or 10mm of bone under 15 mm of flesh? I don't know about that.

[@matthelord7695]

According to militsry doccuments a witness plage of 0.5mm being penetrated by spall means the armor failed and the damage is lethal

[@mattthemouse1]

I'm going to tell my nephews this is how Legos are made

[@tone618]

My man does not know what kevlar spall liners are

[@mikear.4062]

I didn't like how the music kept me magnetized on the vid. . . . . . . Do it again.

[@Tob-Balčiūnas]

The dude who walks upside-down on the inside of the tank: 💀

[@gamerfox9510]

the Minecraft music made this video amazing

[@willi-fg2dh]

don't care . . . don't want to be there . . . don't want anyone else to have to be there!

[@antimatter4733]

Wait I'm a bit confused, did the slightly thicker unribbed armor have more spalling than the thinner unribbed armor?

[@Zereniti77]

Any difference between horizontal and vertical ribs?

[@Crowbars357]

You have to paint it red to go fasta, purple for stealth, and yellow to make it tougher

[@GeistView]

any way to model it with a "spall liner"? thank you

[@MaxB-q9d]

Why this so satisfying

[@MarkoDash]

give it another decade or so and games will be doing these sims in real time

[@piedpiper1172]

Idk, feels like it’s been a decade and nearly every game is still single core or, at best, has devastatingly poor multi core utilization. If/when games start really stretching to maximize multi core and multi threading advancements, maybe. Until then we will all keep being cpu bound on sim-intensive games no matter how much money we yeet at our builds.

[@RosaStorming]

The bars on Swedish tanks such as the S tank were to disrupt sabot rounds and heat to my knowledge.

[@ferrofeles2063]

i wonder how a combination of high hardness ribs on the outside and softer ribs on the inside would do ?

[@emanwe01]

I have to wonder how much of the hardened ribs' performance simply came from there being a hardened outer layer at all. I would have liked to see another case tested: the same amount of hardened material, but as a smooth layer instead.

[@Iron_Soil]

how did 50mm do better than 58mm

[@snowmanjj]

was not expecting minecraft music

[@eatafox]

Needed a 50mm plate with thin 8.3mm harden plate on top, and one on the reverse, and two 25mm plates with a 8.3mm hardened plate sandwiched in-between. also two 25mm plates with the ribs sandwiched in-between both hardened and not, creating some weird spaced armour.

[@TheAngryConsumer]

Would a Kevlar lining trap the spalling?

[@ToxicJelly9]

Yes

[@Omega_1111]

Actually really interesting to me that the 50mm plate did better than the 58.3mm plate

[@riandickson5130]

wouldn't hitting underneath the edge of the rib cause a downward deflection instead of an upward deflection? which might change the projected damage and penetration. hard edges on armor are not usually a good idea as they can guide the damage into where the perpendicular walls meet

[@SuprSBG]

Ooo Minecraft music fits so well

[@beefgoat80]

I haven't broken a rib yet, but I've cracked a rib or two more than once. Out of all the injuries I've ever sustained, cracked ribs had to be the most annoying of them all. Actually, a concussion is up there. I almost forgot about that one. Anyway, call your mom.

[@brianhiles8164]

This is all nonsense; I do not know from whence officially vetted research has been sourced. I am not incentivized to look past the fact that a “sufficiently“ fast projectile (the magnitude of which you do not indicate!) would immediately and egregiously deform in that way under impact with an (aluminum!) rib -- or anything else. Just wouldn´t happen! Who are you people? What software are you using? What results as compared to real life event?

[@markpinther9296]

I think somebody swapped out your music track with graduation ceremony music.

[@jay-by1se]

I get the point of this is to have fun. But I design heavy armor for a living and this simulation is missing lots of variables. This is simulating, a metal casting like a World War II tank.. modern armor has so many variables to it that simulation is almost impossible.

[@simulationbros]

We accounted for them

[@VNG_oof]

I would also like to see what happens after a second shot is fired in the same place and how much easier it passes through

[@liammiller1472]

This music made me a rib fan

[@CoiledMoons]

Can you run the simulations with the shell impacting at the joint of the high-hardness ribs (last case) and rolled steel? I'm concerned the tip of the tungsten/high-hardness core will be deflected down into the softer steel, rather than up and away as it was in this simulation. APDS shells have little phalanges for just this purpose - to catch the armor and pivot the shell directly downwards, driving it perpendicular to a sloped plate. I think that case is why face-hardening proved popular for a while; gets some of the high-hardness bonus without accidentally deflecting the shell into an area of comparatively lower hardness.

[@elfeiin]

Hi.Can you please do a variety of projectile hardnesses and sizes?

[@hissingoose]

Ribbed, for your pleasure and theirs.

[@OxBlitzkriegxO]

Now make the ribs in a V shape, hardened.