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Ji, Wooseok
Composite Materials and Structures Lab
Research Interests
  • Mechanics of composites
  • In situ experiments
  • Fracture mechanics
  • Computational solid mechanics
  • Advanced finite element methods
  • Static and dynamic stability of structures

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Fragmentation of an axially impacted slender rod

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Title
Fragmentation of an axially impacted slender rod
Author
Ji, WooseokWaas, A. M.
Issue Date
2010-02
Publisher
EDP Sciences
Citation
EPL, v.89, no.4, pp.1 - 4
Abstract
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/9563
DOI
10.1209/0295-5075/89/46003
ISSN
1286-4854
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