Fragmentation of an axially impacted slender rod
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- Fragmentation of an axially impacted slender rod
- Ji, Wooseok; Waas, A. M.
- Issue Date
- EDP Sciences
- EPL, v.89, no.4, pp.1 - 4
- Motivated by experimental results on the dynamic buckling and fragmentation of a vertical column impacted by a falling mass, results from an analytical model for dynamic buckling which considers the dynamic interaction between the axial column deformation and the out-of-plane buckling displacements are used to interpret the fragmentation process and the resulting fragment lengths. It is shown that a critical time exists for the rod to undergo fragmentation. At this critical time, the rod deforms in a modulated pattern of waves, setting up the stage for the ensuing fragmentation as a result of induced large curvatures that exceed the critical bending strain of the rod material. The resulting fragment length distributions, which show two characteristics peaks at lambda/2 and lambda/4, where lambda is a characteristic half-wavelength, are found to compare favorably with the experimental results.
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