Engineering Mechanics

International Conference

Proceedings Vol. 27/28 (2022)


May 9 – 12, 2022, Milovy, Czech Republic
Editors: Cyril Fischer and Jiří Náprstek

Copyright © 2022 Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prague

ISBN 978-80-86246-48-2 (printed)
ISBN 978-80-86246-51-2 (electronic)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

list of papers scientific commitee

Strain-rate dependent compressive properties of inverted honeycomb lattice and bulk cylindrical samples 3D printed by MSLA method
Falta J., Yunus Yilmaz E.
pages 93 - 96, full text

Masked Stereolithography (MSLA) is an additive manufacturing process based on the photocuring of an entire printed layer of resin at once with the use of a UV light source, in this case a monochrome LCD display. The prints can be used not only for visualization of structures and parts, but also for development of elements of real constructions. The main objective of the study is to describe the mechanical properties under different types of loading, in particular to analyze the strain-rate sensitivity of compression response in bulk and inverted honeycomb lattice samples with three different strut widths. The specimens were experimentally investigated under quasi-static and high strain rate loading. Split Hopkinson Pressure Bar (SHPB) apparatus was used for the high strain rate experiments. The experiments were observed with a high-speed camera to allow analysis of the deformation processes. Digital Image Correlation (DIC) software was used to evaluate the displacement and stress fields. The results revealed a strong effect of strain rate, especially between quasistatic and high strain rate loads. An auxetic behavior was observed for the inverted honeycomb structure, which depends on the thickness of the struts.

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Ownership of copyright in original research articles remains with the Authors, and provided that, when reproducing parts of the contribution, the Authors acknowledge and/or reference the Proceedings, the Authors do not need to seek permission for re-use of their material.

All papers were reviewed by members of the scientific committee.

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