Instrumented dynamic penetration of sandwich panels with auxetic and non-auxetic core using direct impact Hopkinson bar

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21260%2F23%3A00369206" target="_blank" >RIV/68407700:21260/23:00369206 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1002/adem.202300980" target="_blank" >https://doi.org/10.1002/adem.202300980</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adem.202300980" target="_blank" >10.1002/adem.202300980</a>

Result language

angličtina

Original language name

Instrumented dynamic penetration of sandwich panels with auxetic and non-auxetic core using direct impact Hopkinson bar

Original language description

The paper deals with the dynamic penetration of 3D printed panels with auxetic and conventional honeycomb unit cell-based cores. The geometry of the unit cells and their periodic assembly in the resulting lattices were selected to ensure the same relative density and overall weight of the individual sample types. Such a similarity of both specimen types allowed the evaluation of differences between conventional and auxetic lattices in terms of penetration characteristics and deformation energy mitigation properties. Dynamic penetration of the samples was performed using a fully strain-gauge instrumented Open Hopkinson Pressure Bar (OHPB) at three impact velocities resulting in three loading scenarios. All performed experiments were captured by two optical cameras for detailed observation and for tracking of an impactor movement using Digital Image Correlation (DIC). The force-penetration depth relation was used to evaluate the elastic and post-yield compression characteristics of the lattices together with their deformation energy mitigation capabilities. The results show that the main differences in the deformation response of lattices consist of lower overall stiffness and effective yielding of the auxetic lattices at higher penetration depth. Numerical simulation using an explicit solver was performed to analyze the deformation mechanism of the individual core types.

Czech name

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Czech description

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Type

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

CEP classification

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OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/GM22-18033M" target="_blank" >GM22-18033M: High velocity impact dynamics with fast and flash X-ray radiography</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Advanced Engineering Materials

ISSN

1438-1656

e-ISSN

1527-2648

Volume of the periodical

25

Issue of the periodical within the volume

24

Country of publishing house

DE - GERMANY

Number of pages

15

Pages from-to

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UT code for WoS article

001097268300001

EID of the result in the Scopus database

2-s2.0-85175973900