Modeling the effect of granular media arrangements on strains applied to an impact surface using digital image correlation
Author(s)
Pacheco, Carlos Maximiliano
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Abstract
A series of physical experiments performed on an apparatus are presented to investigate
the contact and wave propagation in granular media combinations with a flexible elastomer
impact surface. The design, fabrication, and modifications of the apparatus and experimental
setup are discussed in detail. Its capabilities are demonstrated by obtaining clear displacement
measurements of the elastomer at maximum compression. Results between combinations are
quantified and compared by calculating the strains experienced under the area of contact between
the granules and the elastomer impact surface. The modification of the experimental setup allows
for the recording of the area under the center, left most, and right most granules at maximum
compression. A digital image correlation (DIC) technique is implemented through the ncorr
software to calculate these strains using the recorded displacements of the elastomer boundary.
The results gain insight into the change in strains and energy experienced based on different
granule diameters used in the varying combinations. Relationships between the physical results
and existing computer models are discussed.
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Date
2024-04-17
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