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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
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Active heterogeneous mode coupling in bi-level multi-physically architected metamaterials for temporal, on-demand and

S Mondal1, T Mukhopadhyay1, S Naskar2

  • 1Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, UK.

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Summary

This study introduces novel metamaterials that couple normal and shear deformation modes. This breakthrough enables tunable stiffness and active cloaking for advanced mechanical applications.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Physics

Background:

  • Traditional materials exhibit uncoupled normal and shear deformation modes.
  • Achieving coupled deformation modes typically requires complex, non-symmetric lattice structures.

Purpose of the Study:

  • To develop a new class of metamaterials with voltage-dependent, heterogeneous mode coupling between normal and shear deformation.
  • To enable active multi-modal stiffness modulation and advanced mechanical functionalities.

Main Methods:

  • Utilizing conventional symmetric lattice geometries.
  • Intuitively mounting electro-active elements to achieve bi-level, multi-physically architected metamaterials.

Main Results:

  • Demonstrated unprecedented programmable voltage-dependent normal-shear constitutive mode coupling.
  • Achieved active multi-modal stiffness modulation for tunable mechanical responses.
  • Showcased active partial cloaking capabilities against complex stresses.

Conclusions:

  • The developed symmetric metamaterials offer real-time control of mechanical responses.
  • This technology facilitates temporal programming for advanced applications like morphing geometries, soft robotics, and vibration control.