Detalle Publicación

Breaking arches with vibrations: the role of defects
Título de la revista: PHYSICAL REVIEW LETTERS
ISSN: 0031-9007
Volumen: 109
Número: 6
Fecha de publicación: 2012
Lugar: WOS
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.