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1. Effect of Topology on Transient Dynamic and Shock Response of Polymeric Lattice Structures

Descrizione:: Architected cellular materials, such as lattice structures, offer potential for tunable mechanical properties for dynamic applications of energy absorption and impact mitigation. In this work, the static and dynamic behavior of polymeric lattice structures was investigated through experiments on octet-truss, Kelvin, and cubic topologies with relative densities around 8%. Dynamic testing was conducted via direct impact experiments (25–70 m/s) with high-speed imaging coupled with digital image correlation and a polycarbonate Hopkinson pressure bar. Mechanical properties such as elastic wave speed, deformation modes, failure properties, particle velocities, and stress histories were extracted from experimental results. At low impact velocities, a transient dynamic response was observed which was composed of a compaction front initiating at the impact surface and additional deformation bands whose characteristics matched low strain-rate behavior. For higher impact velocities, shock analysis was carried out using compaction wave velocity and Eulerian Rankine–Hugoniot jump conditions with parameters determined from full-field measurements.
Parola chiave:: Failure, Digital image correlation, Transient dynamic, Shock, Lattice structure, and Compaction
Soggetto:: Applied Science and Engineering
Creatore:: Weeks, J. S. and Ravichandran, Guruswami
Owner:: n.sakthivel@jioinstitute.edu.in
Editore:: Springer Nature
luogo:: Switzerland
Lingua:: English
Data caricata:: 21-03-2023
Data modificata:: 21-03-2023
data di creazione:: 01-12-2022
Rights Statement Tesim:: In Copyright
Resource Type:: Article
Identifier:: 10.1007/s40870-022-00359-2

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1. Effect of Topology on Transient Dynamic and Shock Response of Polymeric Lattice Structures

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