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Discretely assembled mechanical metamaterials.

Benjamin Jenett1, Christopher Cameron2, Filippos Tourlomousis3

  • 1Center for Bits and Atoms, Massachusetts Institute of Technology, Cambridge, MA, USA. bej@mit.edu.

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|November 19, 2020
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Summary
This summary is machine-generated.

Researchers developed a new system for mechanical metamaterials using discrete part assembly. This modular approach overcomes limitations of traditional manufacturing, enabling scalable and versatile material properties.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Physics

Background:

  • Mechanical metamaterials derive unique properties from the geometry and arrangement of their constituent cells.
  • Traditional additive manufacturing of monolithic metamaterials faces limitations in scale and manufacturing constraints.

Purpose of the Study:

  • To introduce a novel construction system for mechanical metamaterials based on discrete assembly of standardized parts.
  • To enable the creation of metamaterials with tunable properties like rigidity, compliance, chirality, and auxetic behavior through modular design.

Main Methods:

  • A design methodology was developed where global material properties emerge from the local mechanisms of discrete parts.
  • Parts were produced using best-practice manufacturing for reliability and cost-effectiveness.
  • Numerical modeling and experimental characterization were employed to validate metamaterial behaviors.

Main Results:

  • The discrete assembly system successfully produced mechanical metamaterials with a range of properties.
  • The approach demonstrated scalability, overcoming limitations associated with monolithic structures.
  • Interchangeability of parts facilitated consistent assembly and property tuning.

Conclusions:

  • Discrete assembly offers a flexible and scalable alternative for fabricating mechanical metamaterials.
  • This modular system allows for precise control over material properties by designing individual components.
  • The methodology supports low-cost production and opens new avenues for designing advanced functional materials.