Measuring impact force?

[breaching]

To test rounds ( door breaching rounds), I am thinking about firing at mild steel and aluminum plates to see the deformation on different door breaching rounds.
I just want to know what rounds performs better. Building full set of doors cost too much..

I am wondering whether measuring deformation is good enough or not.. depth or hole size..

Better ideas anyone?

 

[IRstuff]

?? Don't you want breaching on the first shot? Deformation is interesting, but not sufficient to do the job, is it?

Nonetheless, deformation is generally more of interest for armor designers, since they want to minimize secondary damage. Antiarmor guys are generally more interested in penetration, ala what achieves V₅₀ (50% probability of penetration) in rolled homogeneous armor. see MIL-STD-376 as reference.

Note that you'll need to determine the armor-like properties of the "door" to allow users to do meaningful comparisons, but I've not researched what's required there.

TTFN

FAQ731-376
Chinese prisoner wins Nobel Peace Prize

 

[Wrenchbender]

One word answer, I think is yes. It should be a good comparison within limits. Sounds like you do not want to penetrate the door with a nice round, one-caliber hole, but to create personal access. For that you need a projectile that maybe flattens out and whose velocity drops to zero in the shortest amount of time, hence puts the biggest dent in your 'standard' plate. You may also want to document striking velocity, plate material and hardness, projectile mass and take some high speed photos in case you ever want do a more thorough analysis. This is high strain rate stuff even for something like a shotgun round.