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Non-cuttable material created through local resonance and strain rate effects

Szyniszewski, Stefan; Vogel, Rene; Bittner, Florian; Jakubczyk, Ewa; Anderson, Miranda; Pelacci, Manuel; Chinedu, Ajoku; Endres, Hans-Josef; Hipke, Thomas

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Rene Vogel

Florian Bittner

Ewa Jakubczyk

Miranda Anderson

Manuel Pelacci

Ajoku Chinedu

Hans-Josef Endres

Thomas Hipke


We have created a new architected material, which is both highly deformable and ultra‐resistant to dynamic point loads. The bio-inspired metallic cellular structure (with an internal grid of large ceramic segments) is non-cuttable by an angle grinder and a power drill, and it has only 15% steel density. Our architecture derives its extreme hardness from the local resonance between the embedded ceramics in a flexible cellular matrix and the attacking tool, which produces high-frequency vibrations at the interface. The incomplete consolidation of the ceramic grains during the manufacturing also promoted fragmentation of the ceramic spheres into micron-size particulate matter, which provided an abrasive interface with increasing resistance at higher loading rates. The contrast between the ceramic segments and cellular material was also effective against a waterjet cutter because the convex geometry of the ceramic spheres widened the waterjet and reduced its velocity by two orders of magnitude. Shifting the design paradigm from static resistance to dynamic interactions between the material phases and the applied load could inspire novel, metamorphic materials with pre-programmed mechanisms across different length scales.

Journal Article Type Article
Acceptance Date May 12, 2020
Online Publication Date Jul 20, 2020
Publication Date 2020
Deposit Date Jul 20, 2020
Publicly Available Date Jul 21, 2020
Journal Scientific Reports
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 10
Article Number 11539
Public URL


Published Journal Article (9.7 Mb)

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