Morphological optimization of tensegrity-type metamaterials

Tommasi, Domenico De; Marano, Giuseppe Carlo; Puglisi, Giuseppe; Trentadue, Francesco

doi:10.1016/j.compositesb.2016.10.017

Cited by 38 publications

(12 citation statements)

References 8 publications

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“…1, with arbitrary complexity, fixed total length L, under a given compressive load P . Numerical extensions to the threedimensional case has been recently proposed in [4].…”

Section: Main Results: Optimality Of Fractal Tensegritiesmentioning

confidence: 99%

See 1 more Smart Citation

Fractality in selfsimilar minimal mass structures

Tommasi

Maddalena

Puglisi

et al. 2017

Journal of the Mechanics and Physics of Solids

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“…1, with arbitrary complexity, fixed total length L, under a given compressive load P . Numerical extensions to the threedimensional case has been recently proposed in [4].…”

Section: Main Results: Optimality Of Fractal Tensegritiesmentioning

confidence: 99%

“…To the knowledge of the authors, there exists no general theory regarding such connections, and that no rigorous (analytical, variational) deduction of fractal mass minimizer are available. In this regards we refer to the recent paper [4].…”

Section: Tensegrity Columns With Increasing Complexitymentioning

confidence: 99%

Fractality in selfsimilar minimal mass structures

Tommasi

Maddalena

Puglisi

et al. 2017

Journal of the Mechanics and Physics of Solids

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“…Here, conversely, the proposed approach is to store energy from external loads as mechanical (elastic) energy in the strings and bars of D-bar systems without triggering local structural instabilities such as buckling and thereby allowing for more reliable structures. Other applications of D-bar tensegrity systems as lightweight energy absorption components include advanced materials formed by tensegrity lattices [22][23][24][25][26] and buildings with enhanced seismic-resistance and lightweight reinforcements. 13,27,28 As illustrated in Figure 1, a D-bar system of complexity 1 (a D-bar unit) is generated by replacing a compressive structural member with 2p bars emanating from its end-points toward the vertices of a centered p-sided polygon formed by strings (p = 3 in Figure 1(b)).…”

Section: Introductionmentioning

confidence: 99%

Analytical study of tensegrity lattices for mass-efficient mechanical energy absorption

Goyal

Hernandez

Skelton

2019

International Journal of Space Structures

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This article studies tensegrity structures known as “D-bar” systems for applications as lightweight components for mechanical energy absorption. Aerospace structures such as planetary landers, designed to absorb energy from large impact loads while requiring minimal mass, would benefit from such components. Previous studies showed that D-bar systems support compressive loads with minimal mass compared with continuum options such as single columns. In this work, analytical equations for the mechanical (elastic) energy stored in D-bar systems of any complexity (a quantity proportional to the number of strings/bars in the system) are derived for the first time. The energy stored in D-bar systems is compared with that of bent buckled beams used in “flexible-bar tensegrity” concepts, which were proposed in the literature as energy absorption components for planetary landers. Comparisons are made between D-bar systems and bent buckled beams as isolated components subjected to a compressive load and as components of planetary landers. In all comparisons, the results show that D-bar systems of low complexity allow for higher energy storage and lower mass than bent buckled beams. Thus, it is concluded that D-bar systems can enhance the design of planetary landers and other applications that need lightweight mechanical energy absorption components.

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“…Self-similar tensegrity columns of order 1 and higher order were proposed in reference [19]. The paper reference [20] is dedicated to the morphological optimization of tensegrity-type metamaterials with a prototypical model of an infinite slab. The formulation of the novel class θ=1 units was presented in reference [21] with the discussion of potential of such structures for mechanical metamaterials.…”

Section: Introductionmentioning

confidence: 99%

Soft and Stiff Simplex Tensegrity Lattices as Extreme Smart Metamaterials

Sabouni-Zawadzka

Gilewski

2019

Materials

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The present paper is dedicated to an evaluation of novel cellular metamaterials based on a tensegrity pattern. The materials are constructed from supercells, each of which consists of a number of simplex modules with different geometrical proportions. Mechanical properties of the metamaterial can be controlled by adjusting the level of self-equilibrated forces or by changing the properties of structural members. A continuum model based on the equivalence of strain energy of the 3D theory of elasticity with a discrete formulation is used to identify the qualitative properties of the considered metamaterials. The model allows the inclusion of nonlinearities related to the equations of equilibrium in actual configuration of the structure with self-equilibrated set of normal forces typical for tensegrities. The lattices are recognised as extreme metamaterials according to the eigensolution of the equivalent elasticity matrices of the continuum model. The six representative deformation modes are defined and discussed: stiff, soft and medium extensional modes and high (double) as well as low shear modes. The lattices are identified as unimode or nearly bimode according to the classification of extreme materials.

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Morphological optimization of tensegrity-type metamaterials

Cited by 38 publications

References 8 publications

Fractality in selfsimilar minimal mass structures

Fractality in selfsimilar minimal mass structures

Analytical study of tensegrity lattices for mass-efficient mechanical energy absorption

Soft and Stiff Simplex Tensegrity Lattices as Extreme Smart Metamaterials

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