- #1

Enthalpy

- 667

- 4

Found in Dubbel (Taschenbuch für den Maschinenbau) page C47 7.3.2 the

**axial load that buckles a thin cylindre**. This is

**not Euler**'s buckling of a long compressed beam, but probably from

**Timoshenko**'s theory for shell buckling applied to a thin cylinder.

The

**book**gives:

σ = e/R*E/(3(1-μ

^{2}))

^{0.5}where σ is the stress,

and taking Poisson's coefficient μ as 0.33 I obtain

σ/E = 0,612*e/R

and

**F = 3,845*e**.

^{2}*EAs I mistrust buckling computations, I stepped on a

**soda can over bathroom scales**and got instead

**F = 0,68*e**

^{2}*Efar less...

I use this lower value now for my computations, but maybe I botched the experiment? I measured the thickness properly with a micrometer at several positions, tried to step slowly and vertically...

**Do you have more experimental values, or different formulas from a theory?**

And if someone steps on a can, please mind your ankle, I hurt mine.

Thank you!