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Thread: higher pressure = harder to penetrate?

  1. #1
    Inactive Member

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    Default higher pressure = harder to penetrate?

    shot a used flat tyre from 60yrds. penetrated one side from tyre side wall.

    question: if the tyre fully inflated will it possible to achieve the same result?

  2. #2
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    might still do it, you'll have to try it out on the neighbours 4x4.

    When I used to bike to school I used to pump my bicycles tires very hard, I never got thorn punctures like my mates. Trade off was a very bumpy ride though.

    ...

  3. #3
    Sharp Shooter

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    Depends on impact energy which is in turn a function of velocity and mass of projectile VS the integral strength of the substrate + internal pressure. Relates to cheap Korean bike tyre with low structure carbon black filler reinforcement VS more expensive German tyre with better reinforcing black filler delivering better tensile strength together with polymer type ratio's rendering (maybe) better cut resistance... etc, etc.
    Too much polymer science 4 my flat brain this time 'o a Fri nite.

  4. #4
    Sharp Shooter

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    But, ya, generally, the higher the internal pressure, the lesser the inward deflection of the sidewall, reducing the surface area of contact, in turn reducing the force transmitted to the object = less chance of penetration (failure initiation), but closer you get to the ultimate strength yield of the object (sidewall) = immediate critical falure.

    Uggh, somebody stop me, too much frontal lobe activity for a Fri nite. Maybe some wine....

  5. #5
    Sharp Shooter
    Protea FT Team '06

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    i think it will penetrate more being inflated due to the inertia on the side wall.

  6. #6
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    i will be getting some new tyres for the scooby next week......you are more than welcome to shoot'em SO3's 215/40ZR17. will cost u to fly up though

  7. #7
    Sharp Shooter

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    The place I work for doesn't make 215/40R17's. So, that implies it won't be our brand you'll replace 'em with = I might just take you up on that offer to come shoot 'em up 4 ya (the new ones tha is!)
    Just kidding... But, what scooby is it u've got?
    I'm lookin' at geting the Impreza WRX SW next Feb...

  8. #8
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    got the old school GT........
    also looking to upgrade next year

  9. #9
    Sharp Shooter

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    Cool.
    Somehow the words "old School" brings back mems of my 3.0GLX Sierra and the smell of 97 fumes when I used to "floor" her.
    I guess "old school" is cool for a lotta things till...

  10. #10
    Inactive Member

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    I agree with Jason. The tyre wall will be less likely to "give way".

  11. #11
    Sharp Shooter

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    I think if the pressure in the tyre is high enough the tyre will "explode". This might be a good one to send to Myth Busters and let them test it.

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