Reference : Breaking Arches with Vibrations: The Role of Defects
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Breaking Arches with Vibrations: The Role of Defects
Lozano, Celia []
Lumay, Geoffroy mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
Zuriguel, Iker []
Hidalgo, R.C. []
Garcimartín, Angel []
Physical Review Letters
American Physical Society
Yes (verified by ORBi)
[en] Granular materials ; flow ; arches
[en] We present experimental and numerical results regarding the stability of arches against external vibrations. Two-dimensional strings of mutually stabilizing grains are geometrically analyzed and subsequently submitted to a periodic forcing at fixed frequency and increasing amplitude. The main factor that determines the granular arch resistance against vibrations is the maximum angle among those formed between any particle of the arch and its two neighbors: the higher the maximum angle is, the easier it is to break the arch. On the basis of an analysis of the forces, a simple explanation is given for this dependence. From this, interesting information can be extracted about the expected magnitudes of normal forces and friction coefficients of the particles composing the arches.

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