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Updated: Apr 15, 2026
08:32
Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
Published on: May 14, 2016
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Mechanical cloak design by direct lattice transformation
Tiemo Bückmann1, Muamer Kadic2, Robert Schittny2
1Institute of Applied Physics and tiemo.bueckmann@kit.edu.
Summary
Researchers developed a novel method to cloak objects by transforming lattice points, not material properties. This approach simplifies elastic mechanics and achieves effective cloaking of voids in materials, confirmed by experiments.
Area of Science:
- Solid mechanics
- Metamaterials
- Acoustic and elastic cloaking
Background:
- Spatial coordinate transformations are established tools in physics.
- Material-parameter transformations enable advanced functionalities like cloaking but require specific mathematical conditions.
- Elastic-solid mechanics presents challenges for conventional transformation methods due to form invariance limitations.
Purpose of the Study:
- To introduce a simplified approach for designing functional materials.
- To demonstrate effective cloaking in elastic-solid mechanics.
- To validate the proposed method through numerical simulations and experimental verification.
Main Methods:
- Direct transformation of lattice points in a 2D discrete lattice.
- Preservation of constituent material properties.
- Application to cloaking a void in an effective elastic material under static uniaxial compression.
- Numerical calculations and experimental validation using 3D-printed polymer structures.
Main Results:
- The lattice point transformation method is shown to be effective across various applications.
- Successful cloaking of a void in an elastic material was achieved.
- Experimental results closely matched theoretical predictions, demonstrating high cloaking quality.
Conclusions:
- The direct lattice transformation approach offers a simpler alternative to material-parameter transformations in elastic mechanics.
- This method provides a viable pathway for designing advanced elastic metamaterials.
- The study confirms the efficacy of lattice transformation for achieving elastic cloaking.
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