Structure and Mechanical Properties of High-Porosity Macroscopic Agglomerates Formed by Random Ballistic Deposition

Details Structure and Mechanical Properties of High-Porosity Macroscopic Agglomerates Formed by Random Ballistic Deposition Structure and Mechanical Properties of High-Porosity Macroscopic Agglomerates Formed by Random Ballistic Deposition

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrvl..93k5503b&link_type=abstract

Physical Review Letters, vol. 93, Issue 11, id. 115503

Physics

46

Fractals, Macroscopic Aggregates, Granular Systems, Growth From Solid Phases

Scientific paper

We present experimental results on the mechanical properties of macroscopic agglomerates formed by ballistic hit-and-stick deposition. The agglomerates, produced with a new experimental method, consist of monodisperse SiO2 spheres with 1.5 μm diameter and have a volume filling factor of ϕ=0.15, matching very closely the theoretical value for random ballistic deposition. They are mechanically stable against unidirectional compression of up to 500Pa. For pressures above that value, the volume filling factor increases to a maximum of ϕ=0.33 for pressures above 105 Pa. The tensile strength of slightly compressed samples (ϕ=0.2) is 1000Pa.

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