Compressive strength of a basic 4 inch diameter body tube for LOC-IV

[Lt72884]

I have been google'ing and cannot find any particular information on how much pressure the cardboard type airframe of the LOC-IV can handle. I am also looking for compressive strength. I do know that at 12.4 lbs, the nose cone is pushed off for this particular design.

https://locprecision.com/products/loc-ivBasically, how much weight (force) can the tube hold before crushing? As if i were standing on it like a coke can

Thanks

 

[Reinhard]

The Internet Archive has still the data from rocketmaterials.org
https://web.archive.org/web/2015021...aterials.org/datastore/tubes/Axial/index.html
4" LOC tubing was not tested, but 3" and 5.5" tubing. This should give you a close enough idea.

Note: The samples were short enough to not exhibit buckling failure. A longer tube will not be as strong.

Reinhard

 

[Donnager]

Are you referring to internal pressure from ejection charges, or ability of the tube to support weight in the longitudinal direction?

 

[jcampb81]

If you can find the Modulus of Elasticity for non-corrugated cardboard, you can use Euler's Column buckling formula to determine the force it would require to make your specific length of tube start to buckle.

Fcr = (n*pi^2*E*I) / (L^2)

Fcr = Critical buckling force
n = factor
E = Modulus of Elasticity
I = Moment of Inertia
L = length of Tube