Additively manufactured metallic pentamode meta-materials

Hedayati, R.; Leeflang, M.A.; Zadpoor, A.A.

doi:10.1063/1.4977561

Additively manufactured metallic pentamode meta-materials

Title

Additively manufactured metallic pentamode meta-materials

Author

Hedayati, R. (TU Delft Biomaterials & Tissue Biomechanics)
Leeflang, M.A. (TU Delft Biomaterials & Tissue Biomechanics)
Zadpoor, A.A. (TU Delft Biomaterials & Tissue Biomechanics)

Date

2017

Abstract

Mechanical metamaterials exhibit unusual mechanical properties that originate from their topological design. Pentamode metamaterials are particularly interesting because they could be designed to possess any thermodynamically admissible elasticity tensor. In this study, we additively manufacture the metallic pentamode metamaterials from a biocompatible and mechanically strong titanium alloy (Ti-6Al-4V) using an energy distribution method developed for the powder bed fusion techniques. The mechanical properties of the developed materials were a few orders of magnitude higher than those of the similar topologies fabricated previously from polymers. Moreover, the elastic modulus and yield stress of the presented pentamode metamaterials were decoupled from their relative density, meaning that the metallic meta-biomaterials with independently tailored elastic and mass transport (permeability) properties could be designed for tissue regeneration purposes.

Subject

Metamaterials
Elastic moduli
Laser beams
Yield stress
Topology

To reference this document use:

http://resolver.tudelft.nl/uuid:64edcd3c-ee6e-434a-a95e-caff4db47d64

DOI

https://doi.org/10.1063/1.4977561

ISSN

0003-6951

Source

Applied Physics Letters, 110 (9)

Part of collection

Institutional Repository