A variable-topology morphing composite cylindrical lattice

Carey, Seán; McHale, Ciarán

doi:10.1016/j.compstruct.2021.114542

Cited by 4 publications

(1 citation statement)

References 16 publications

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“…One example of the synergy between elasticity and topology changes is demonstrated by bistable helical lattices. Here the combined tailoring approach widens the deployment capacity from a linear extension to one which will trace a curvilinear path [16,17]. Topological changes in lattice-based (meta-) materials/structures show that a bending-dominated topology can be transformed into a stretching-(or membrane-) dominated topology or vice-versa either via programming with external stimuli…”

Section: Topology Morphingmentioning

confidence: 99%

Topology Morphing in Lattice Structures Through Tensile Buckling

Sundararaman,

McHale,

P. O’Donnell

et al. 2023

ASME 2023 Aerospace Structures, Structural Dynamics, and Materials Conference

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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.

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Section: Topology Morphingmentioning

confidence: 99%

Topology Morphing in Lattice Structures Through Tensile Buckling

Sundararaman,

McHale,

P. O’Donnell

et al. 2023

ASME 2023 Aerospace Structures, Structural Dynamics, and Materials Conference

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Adaptive stiffness in lattice metastructures through tensile-buckling inspired topology morphing

Sundararaman,

McHale,

O’Donnell

et al. 2024

International Journal of Solids and Structures

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Design, modeling, and manufacturing of high strain composites for space deployable structures

Ma,

An,

Cong

et al. 2024

Commun Eng

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The demand for larger and lighter mechanisms for next-generation space missions necessitates using deployable structures. High-strain fiber polymer composites show considerable promise for such applications due to their exceptional strength-to-weight ratio, manufacturing versatility, packaging efficiency, and capacity for self-deployment using stored strain energy. However, a significant challenge in using composite deployable structures for space applications arises from the unavoidable extended stowage periods before they are deployed into their operational configuration in orbit. During the stowage period, the polymers within the composites experience material degradation due to their inherent viscoelastic and/or plastic properties, causing stress relaxation and accumulation of plastic strains, thereby reducing the deployment capability and resulting in issues related to recovery accuracy. This paper aims to give a state-of-the-art review of recent advances in the design, modeling, and manufacturing of high-strain composites for deployable structures in space applications, emphasizing the long-term stowage effects. This review is intended to initiate discussion of future research to enable efficient, robust, and accurate design of composite deployable structures that account for the enduring challenges posed by long-term stowage effects.

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A variable-topology morphing composite cylindrical lattice

Cited by 4 publications

References 16 publications

Topology Morphing in Lattice Structures Through Tensile Buckling

Topology Morphing in Lattice Structures Through Tensile Buckling

Adaptive stiffness in lattice metastructures through tensile-buckling inspired topology morphing

Design, modeling, and manufacturing of high strain composites for space deployable structures

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