Experimental and numerical investigation of conventional and stiffened re-entrant cell structures under compression

Öztürk, Mitat; Baran, Tarık; Tatlier, Mehmet Seha

doi:10.1007/s40430-022-03889-x

Cited by 5 publications

(2 citation statements)

References 81 publications

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“…Auxetic structures are a unique class that reveals negative values of Poisson's ratio (NPR) as results of their counterintuitive deformation behavior. Under uniaxial stretching or compression, auxetic cellular structures reveal lateral expansion or contraction, respectively [10][11][12][13][14][15]. Compared to the traditional materials/structures, it was stated that the auxetic feature (i.e.…”

Section: Introductionmentioning

confidence: 99%

Compressive properties of a modified re-entrant chiral auxetic structure (MRCA) under uniaxial quasi-static loading

Alomarah,

Hamdoon,

Al-Ibraheemi

et al. 2024

Smart Mater. Struct.

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Auxetics are a unique class of innovative materials/structures. Auxetic material/structures possess a negative value of Poisson’s ratio owing to the distinguished deformation behavior represented by the transvers expansion or contraction when they experience uniaxial stretching or compression, respectively. The aim of this manuscript is to show contributions of the structural modification on an auxetic hybrid structure. The in-plane properties of an auxetic structure, called the modified re-entrant chiral auxetic (MRCA) structure under quasi-static compression were experimentally and numerically explored. The experimental specimens were 3D printed using fused deposition modelling (FDM) technique. The commercial ABAQUS/Explicit solver was used to develop the simulated models. Results showed that the structural modification have led to effectively improve deformation coordination (i.e. uniform deformation patterns) and the compressive properties of the modified structure. Young’s moduli were 1.75 and 12.7 higher than those of the original geometry, while values of plateau stress were 3.1 and 1.23 higher than those of the original geometry when they were compressed along the X and Y axes, respectively. The specific energy absorptions per unit mass (SEA) were 4.7 J/g and 3.9 J/g when the MRCA specimens were compressed along the X and Y axes, respectively. However, the added cylinders limited the auxeticity (i.e. the transvers contraction) of the specimens during the compression tests.

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Section: Introductionmentioning

confidence: 99%

Compressive properties of a modified re-entrant chiral auxetic structure (MRCA) under uniaxial quasi-static loading

Alomarah,

Hamdoon,

Al-Ibraheemi

et al. 2024

Smart Mater. Struct.

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“…The results of Montazeri, Bahmanpour et al, 2023 [36] show that the foam-filled TPU-based aerator has good performance. Öztürk, Baran et al, 2022 [37] improved the re-entrant cells, and the modified cells were improved in stiffness, energy absorption capacity and plasticity. The re-entry model established by Usta, Türkmen et al, 2022 [38] shows that the specific energy absorption (SEA) is increased compared with the foam core.…”

Section: Introductionmentioning

confidence: 99%

Impact Response of Re-Entrant Hierarchical Honeycomb

Lian,

Wang

2023

Materials

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Here, hexagonal and triangular lattices are layered and merged into a re-entrant honeycomb to replace each cell wall of the re-entrant honeycomb. In order to study the crushing behavior of the new variable-angle-variable-substructure-number-gradient honeycomb, a finite element analysis of in-plane and out-of-plane crushing was carried out. The effects of different gradient parameters on the deformation mode and extrusion response were discussed, respectively. The results show that different grading parameters have different effects on the crushing behavior of honeycombs for in-plane and out-of-plane crushing. Compared with out-of-plane crushing, the influence of the hierarchical structure on the in-plane crushing deformation mode and the increase in platform stress are much larger. Compared with the ordinary honeycombs, changing the substructure angle does not necessarily improve the platform stress of the honeycomb. From the perspective of platform stress, the layered structure has different effects on the improvement of honeycomb energy absorption; the maximum platform stress of the honeycomb is increased.

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Additive manufacturing of re-entrant structures: Well-tailored structures, unique properties, modelling approaches and real applications

Nugroho,

Dong,

Pramanik

et al. 2023

Additive Manufacturing

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Experimental and numerical investigation of conventional and stiffened re-entrant cell structures under compression

Cited by 5 publications

References 81 publications

Compressive properties of a modified re-entrant chiral auxetic structure (MRCA) under uniaxial quasi-static loading

Compressive properties of a modified re-entrant chiral auxetic structure (MRCA) under uniaxial quasi-static loading

Impact Response of Re-Entrant Hierarchical Honeycomb

Additive manufacturing of re-entrant structures: Well-tailored structures, unique properties, modelling approaches and real applications

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