TOPOLOGY MORPHING IN LATTICE STRUCTURES THROUGH TENSILE BUCKLING

Venkatesh Sundararaman, Ciarán McHale, Matthew P. O’Donnell, Isaac V. Chenchiah, Paul M. Weaver

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Incorporating, by design, tensile buckling into the macroscopic response of lattice structures offers a novel approach for adaptive (meta-)material/structure development. In this study, we explore the potential of utilizing the simultaneous tensile buckling of adjacent cells to induce a transformation in lattice topology. Unit cells are passively transformed from rectangle-like to triangle/pentagon-like unit cells, with an associated change in the effective macroscopic properties. This approach provides a new route to elastically tailor the non-linear response of (meta-) materials/structures. The paper explores the behavior of such a system through finite element analysis. The results identify: i) that the initial lattice internal topology (rectangular) is dominated by membrane effects, ii) a negative region of stiffness is associated with the transformation phase, and iii) once formed, the new topology (triangular/pentagonal) exhibits positive stiffness in both compression and tension.

Original languageEnglish
Title of host publicationProceedings of ASME 2023 Aerospace Structures, Structural Dynamics, and Materials Conference, SSDM 2023
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791887141
DOIs
Publication statusPublished - 2023
EventASME 2023 Aerospace Structures, Structural Dynamics, and Materials Conference, SSDM 2023 - San Diego, United States
Duration: 19 Jun 202321 Jun 2023

Publication series

NameProceedings of ASME 2023 Aerospace Structures, Structural Dynamics, and Materials Conference, SSDM 2023

Conference

ConferenceASME 2023 Aerospace Structures, Structural Dynamics, and Materials Conference, SSDM 2023
Country/TerritoryUnited States
CitySan Diego
Period19/06/2321/06/23

Keywords

  • Morphing
  • Sliding
  • Tensile Buckling
  • Topology

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