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Comment on In a First, America Dropped 30,000-Pound Bunker-Busters—But Iran’s Concrete May Be Unbreakable, Scientists Say

muntedcrocodile@hilariouschaos.com ⁨8⁩ ⁨months⁩ ago

Giving the yield strength in psi is the most pointless thing ever. Every single engineer would use metric Pa so its clearly a conversion for the average american idiot but the average American idiot has no idea what yield strength is.

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slaneesh_is_right@lemmy.org ⁨8⁩ ⁨months⁩ ago
We dropped a big boom worth 120000 hamburgers and the explosion was many football fields big. Salute to the brave troops.

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hobovision@lemm.ee ⁨8⁩ ⁨months⁩ ago
Sorry bud, you’re straight up wrong. Aerospace and defense in the US very much still uses the inch-pound-second system of units.

I’m not a concrete guy, but I know that metals and composites have material properties certified for use in civil and commercial aviation are given in psi in MMPDS and CMH-17. I would be willing to bet that concrete specifications in the US are no different.

I could keep going. Our bolts are specified in ultimate tensile strength by psi. Structural steel standards use minimum yield strengths in psi. There is literally a type of steel called A36 because its minimum required yield strength is 36,000 psi.

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- Hawk@lemmynsfw.com ⁨8⁩ ⁨months⁩ ago
  Yeah psi is a pretty common unit and trivial to swap between if SI is needed.
  
  Arguments like above often show a lack of real world experience.
  
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crapwittyname@lemm.ee ⁨8⁩ ⁨months⁩ ago
I prefer my mechanical stress calculations in dynes per square parsec thank you very much.

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PolydoreSmith@lemmy.world ⁨8⁩ ⁨months⁩ ago
Your post is informative but now all I can hear in my head is Green Day’s “American Idiot”.

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