Kirsch, Roman; Bröckel, Ulrich; Brendel, Lothar; Török, Janos:

Measuring tensile, shear and torsional strength of solid bridges between particles in the millimeter regime

In: Granular matter, Jg. 13 (2011) ; Nr. 5, S. 517-523
ISSN: 1434-7636, 1434-5021
Zeitschriftenaufsatz / Fach: Physik
Fakultät für Physik » Theoretische Physik
In this paper we present a novel experimental
setup created to measure the strength of solid bridges between
double-particle systems in the millimeter range. Beside the
tensile strength, shear and torsional strength can be measured
as well. Urea particles are used which are known for
creating solid bridges under well defined climatic conditions.
The measurements indicate that unlike to isotropic materials
the bridge between two particles has higher shear than tensile
strength. Moreover, the strengthening of the bridges with
storage time is very inhomogeneous, suggesting the use of
wide distribution for bridge strength instead of mean values
in modelling.