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DY: Fachverband Dynamik und Statistische Physik
DY 1: Internal Symposium: Physics of fracture
DY 1.4: Hauptvortrag
Montag, 26. März 2007, 11:00–11:30, H2
Fragmentation phenomena — •Ferenc Kun1, Falk Wittel2, and Hans Herrmann2 — 1Department of Theoretical Physics, University of Debrecen, P.O.Box:5 H-4010 Debrecen, Hungary — 2IfB, HIF, E18, ETH, Hönggerberg, 8093 Zürich, Switzerland
Fragmentation, i.e. the breaking of particulate materials into smaller pieces is abundant in nature and underlies various types of industrial processes. Fragmentation usually occurs when solids are subject to energetic loading in the form of explosion or impact. Fragmentation phenomena can be observed on a broad range of length scales from the collisional evolution of asteroids in the Solar system through geological phenomena and the usage of explosives in mining down to the breakup of fullerenes and heavy nuclei by energetic collisions.
During the last ten years much progress had been achieved in the understanding of fragment mass and velocity distributions as a function of the imparted energy, the geometry and material properties of the fragmenting system. We present an overview of the most important recent experimental and theoretical results which revealed the background of the emergent universal behavior of fragmenting systems. As a specific example we consider the breakup of shells and demonstrate that beyond the well known scaling laws of fragmentation phenomena the shape of fragments also show scaling behavior.