Dynamic impact testing of cellular solids and lattice structures: Application of two-sided direct impact Hopkinson bar

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F21%3A00534057" target="_blank" >RIV/68378297:_____/21:00534057 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21260/21:00345978

Result on the web

<a href="https://doi.org/10.1016/j.ijimpeng.2020.103767" target="_blank" >https://doi.org/10.1016/j.ijimpeng.2020.103767</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijimpeng.2020.103767" target="_blank" >10.1016/j.ijimpeng.2020.103767</a>

Result language

angličtina

Original language name

Dynamic impact testing of cellular solids and lattice structures: Application of two-sided direct impact Hopkinson bar

Original language description

Direct impact testing with a Hopkinson bar is, nowadays, a very popular experimental technique for investigating the behavior of cellular materials, e.g., lattice metamaterials, at high strain-rates as it overcomes several limitations of the conventional Split Hopkinson Pressure Bar (SHPB). However, standard direct impact Hopkinson bars (DIHB) have only single-sided instrumentation complicating the analysis. In this paper, a DIHB apparatus instrumented with conventional straingauges on both bars (a so called Open Hopkinson Pressure Bar - OHPB) was used for dynamic impact experiments of cellular materials. Digital image correlation (DIC) is used as a tool for investigating the displacements and velocities at the faces of the bars. A straight-forward wave separation technique combining the data from the strain-gauges with the DIC is adopted to increase the experiment time window multiple times. The experimental method was successfully tested at impact velocities in a range of 5 − 30m · s−1 with both linear elastic and viscoelastic bars of a medium diameter. It is shown that, under certain circumstances, a simple linear elastic model is sufficient for the evaluation of the measurements with the visco-elastic bars, while no additional attenuation and phase-shift corrections are necessary. The applicability of the experimental method is demonstrated on various experiments with conventional metal foams, hybrid foams, and additively manufactured auxetic lattices subjected to dynamic compression.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Impact Engineering

ISSN

0734-743X

e-ISSN

1879-3509

Volume of the periodical

148

Issue of the periodical within the volume

February

Country of publishing house

SE - SWEDEN

Number of pages

17

Pages from-to

103767

UT code for WoS article

000606493200002

EID of the result in the Scopus database

2-s2.0-85096665585