ABOUT LOCAL AND VOLUME DISPLACEMENTS OF HIGHLY COMPLIANT SPHERES

Ilie MUSCA, Elena VARAREANU (SÎRGHIE), Marius MARCHITAN

Abstract


The paper presents an evaluation of displacements for rubber spheres in compression experiments for: two spheres compressed between two planes and parallel surfaces, two spheres compressed between two bodies with hemispherical cavities and one sphere compressed between two planes and parallel surfaces of rigid bodies.

Theoretical and numerical considerations on the experimental displacement of the rubber spheres are presented, and the difference between the local displacements and the volume displacements is assessed.

During these experiments, three parameters were recorded: the normal load, the normal approach of the contacting spheres, and the relative contact area between spheres or between one sphere and the contact plane.

From these results it can be concluded that: the rubber spheres exhibit large local and volume displacements, which increase with the load level; the local displacements increase with load faster than volume displacements, but both types of displacements have rates that diminish with the increasing load.


References


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