[escepticos] Los temas del twitter de Muy Interesantes

[Rafa Rebolo]

"¿Por qué no puedes partir un espagueti en solo dos trozos? Tiene una
explicación física"

No he leido lo que pone MUY;  pero al menos en este caso pueden tener
razón. Recomiendo el siguiente artículo:


Fragmentation of rods by cascading cracks: why spaghetti do not break in
half

Basile Audoly and S_ebastien Neukirch

Lab. de Mod_elisation en M_ecanique, CNRS/UPMC, 4 place Jussieu, Paris,
France.

(Dated: December 22, 2004)

When thin brittle rods such as dry spaghetti pasta are bent beyond their
limit curvature, they often break into more than two pieces, typically
three or four. With the aim to understand these multiple breakings, we
study the dynamics of a rod bent just below its limit curvature and
suddenly released at one end. We _nd that the sudden relaxation of the
curvature at the newly freed end leads to a burst of exural waves, whose
dynamics are described by a self-similar solution with no adjustable
parameters. These exural waves locally increase the curvature in the rod
and we argue that this counter-intuitive mechanism is responsible for the
fragmentation of brittle rods under bending. A simple experiment supporting
the claim is presented.

Si alguien tiene especial interés en él, que me lo diga y se lo envío.

Saludos