Weak P-Waves under Periodic Load Applied to a Packing of Glass Balls
A. P. BOBRYAKOV, V. P. KOSYKH, A. F. REVUZHENKO
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: упаковки шаров, сыпучий материал, динамические нагрузки, напряжения, силовые “цепочки”, сдвиги, амплитуда, скорость, packing of balls, granular material, dynamic loads, stresses, force "chains", shears, amplitude, velocity
Abstract
Based on the tests of packings of calibrated glass balls with a diameter of 1 mm, it is shown that multiple point impacts improve waveguide characteristics of the medium-conducting paths composed of force “chains” emerge in the test material. The further quasi-static alternating shears change the packing of particles, break the chains and reduce conduction. If continued onward, the multiple impulsive loading results in recovery of the “chains” and in better conduction of the paths.
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