TY - GEN
T1 - TOPOLOGY MORPHING IN LATTICE STRUCTURES THROUGH TENSILE BUCKLING
AU - Sundararaman, Venkatesh
AU - McHale, Ciarán
AU - O’Donnell, Matthew P.
AU - Chenchiah, Isaac V.
AU - Weaver, Paul M.
N1 - Publisher Copyright:
© 2023 by ASME.
PY - 2023
Y1 - 2023
N2 - 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.
AB - 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.
KW - Morphing
KW - Sliding
KW - Tensile Buckling
KW - Topology
UR - http://www.scopus.com/inward/record.url?scp=85176729317&partnerID=8YFLogxK
U2 - 10.1115/ssdm2023-105679
DO - 10.1115/ssdm2023-105679
M3 - Conference contribution
AN - SCOPUS:85176729317
T3 - Proceedings of ASME 2023 Aerospace Structures, Structural Dynamics, and Materials Conference, SSDM 2023
BT - Proceedings of ASME 2023 Aerospace Structures, Structural Dynamics, and Materials Conference, SSDM 2023
PB - American Society of Mechanical Engineers
T2 - ASME 2023 Aerospace Structures, Structural Dynamics, and Materials Conference, SSDM 2023
Y2 - 19 June 2023 through 21 June 2023
ER -