Design, fabrication, and analysis of lattice exhibiting energy absorption via snap-through behavior

Ha, Chan Soo; Lakes, Roderic S.; Plesha, Michael E.

doi:10.1016/j.matdes.2017.12.050

Cited by 138 publications

(43 citation statements)

References 40 publications

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“…7,20,21 This type of structure has been extensively studied due to the attractive properties that can be achieved during design, such as high resistance, low density and the ability to absorb energy. [22][23][24][25][26] Auxetic materials are a type of structure that has attracted great attention, since their concomitant properties make them promising for use in a wide range of fields such as automotive and structural engineering. 27,28 Unlike conventional materials, auxetic materials have a negative Poisson's ratio, i.e.…”

Section: Introductionmentioning

confidence: 99%

Design of an auxetic cellular structure with different elastic properties in its three orthogonal directions

Valle

Pincheira

Tuninetti

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Auxetic structures have become one of the most studied types of cellular structure in recent years, thanks to their highly specific mechanical properties. Most microstructures are designed with homogeneous properties in their main axes; however, in this research, we propose an innovative asymmetric 3D auxetic structure based on a 2D configuration of cells drawn from the literature. The new auxetic cell is designed by topology analysis using classical Timoshenko beam theory. To validate the design, samples were constructed by fused filament fabrication with ABSplus, and tested under quasi-static compression to determine Young's modulus in the three orthogonal directions. The experimental results show good agreement with the topological analysis and reveal that the proposed cell can transmit a different mechanical behavior to the macrostructure in its three orthogonal directions.

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Section: Introductionmentioning

confidence: 99%

Design of an auxetic cellular structure with different elastic properties in its three orthogonal directions

Valle

Pincheira

Tuninetti

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…In addition to “electromagnetic negative materials” such as “negative index materials”, “negative materials” from a mechanical standpoint have also been investigated and developed. These “mechanical negative materials” comprise negative Poisson's ratio (NPR) or auxetic materials, “negative thermal expansion” (NTE) materials, “negative compressibility” (NC) materials, and “negative stiffness” phases . Adding to these, the possibility of “negative hygroscopic expansion” (NHE) or “negative moisture expansion” (NME) materials was recently discussed; an NHE material is one that contracts upon absorption of moisture.…”

Section: Introductionmentioning

confidence: 99%

Negative Hygrothermal Expansion of Reinforced Double Arrowhead Microstructure

Lim

2020

Physica Status Solidi (b)

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A microstructure, consisting of conventional rods, is herein shown to exhibit “negative hygroscopic expansion” (NHE) in the form of a reinforced double arrowhead with freely rotating joints, whereby the NHE occurs in the direction perpendicular to the reinforcing rods. A kinematic analysis enabled the condition of NHE, as well as the conditions of its “negative thermal expansion” (NTE) analogy, to be established. Results show that the likelihood of “negative expansion” is increased when the longer inclined rod expands to a much greater extent in contrast to the expansions of the reinforcing and the shorter inclined rods. Combined description of NHE and NTE not only allows the conditions of “negative hygrothermal expansion” (NHTE) to be put forth but also the condition by which “zero hygrothermal expansion” (ZHTE) is achieved by means of mutual cancellation between both types of expansions. This concept of ZHTE allows a more flexible design of materials and structures that are exposed to simultaneous changes in moisture concentration and temperature, as it does not require the minimization of both the coefficients of hygroscopic and thermal expansions.

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“…PXCMs have been proposed for applications such reusable, solid state energy absorption 2,8,9 , shock or impact isolation 10,11 , and reconfigurable structures 12,13 . PXCMs have also been used to create metamaterials whose mechanical properties (e.g.…”

Section: Introductionmentioning

confidence: 99%

Energy dissipation in functionally two-dimensional phase transforming cellular materials

Zhang

Restrepo

Velay-Lizancos

et al. 2019

Sci Rep

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Phase Transforming Cellular Materials (PXCMs) are periodic cellular materials whose unit cells exhibit multiple stable or meta-stable configurations. Transitions between the various (meta-) stable configurations at the unit cell level enable these materials to exhibit reusable solid state energy dissipation. This energy dissipation arises from the storage and non-equilibrium release of strain energy accompanying the limit point traversals underlying these transitions. The material deformation is fully recoverable, and thus the material can be reused to absorb and dissipate energy multiple times. In this work, we present two designs for functionally two-dimensional PXCMs: the S-type with four axes of reflectional symmetry based on a square motif and, the T-type with six axes of symmetry based on a triangular motif. We employ experiments and simulations to understand the various mechanisms that are triggered under multiaxial loading conditions. Our numerical and experimental results indicate that these materials exhibit similar solid state energy dissipation for loads applied along the various axes of reflectional symmetry of the material. The specific energy dissipation capacity of the T-type is slightly greater and less sensitive to the loading direction than the S-type under the most of loading directions. However, both types of material are shown to be very effective in dissipating energy.

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Design, fabrication, and analysis of lattice exhibiting energy absorption via snap-through behavior

Cited by 138 publications

References 40 publications

Design of an auxetic cellular structure with different elastic properties in its three orthogonal directions

Design of an auxetic cellular structure with different elastic properties in its three orthogonal directions

Negative Hygrothermal Expansion of Reinforced Double Arrowhead Microstructure

Energy dissipation in functionally two-dimensional phase transforming cellular materials

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