Dynamic Performance of a 3D Re-entrant Structure

Logakannan, Krishna Prasath; Ramachandran, V.; Jayaganthan, R.; Ruan, Dong

doi:10.1016/j.mechmat.2020.103503

Cited by 49 publications

(15 citation statements)

References 28 publications

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“…Christensen's (2008) studies found that the yield stresses computed from the 0.2% offset rule deviated from the actual yield stress at a point where nonlinearity can be graphically observed. Furthermore, according to a finding by Logakannan et al (2020), the stresses in dynamic testing (vibration test) were notably higher than those from quasi-static loading possibly due to insufficient time to deform as opposed to quasi-static test.…”

Section: Part 1: Static Compression Testmentioning

confidence: 85%

Correlation of design parameters of lattice structure for highly tunable passive vibration isolator

Azmi

Ismail

Putra

2022

Journal of Vibration and Control

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The purpose of this study is to correlate the influence of multiple size-based design parameters of lattice structure, namely, the unit cell (UC) and strut diameter (SD) through the static and dynamics analyses for passive vibration isolation application. The lattice structures were prepared by utilizing the fused deposition modeling (FDM) additive manufacturing (AM). The samples were designed to retain lattice structure’s unique advantages while also conserving material consumption to fulfill the energy and cost demand. Through the static test, the crush behavior, failure mechanism, and mechanical properties were determined. The stiffness of lattice structure exhibited an increasing relationship with the unit cell and strut diameter where smaller unit cell and bigger strut diameter produced higher strength, and with that, higher load can be sustained. Through the dynamic vibration transmissibility test, it was found that the dynamic vibration results follow closely the trend in the static analysis. Lattice structure with larger unit cell and smaller strut diameter showed larger effective isolation region due to lower natural frequency value. The trade-off limit between stiffness for a lower natural frequency of the proposed design parameters was determined from the two parts analyses. The results suggest that most lattice isolators from the pool of design parameter combinations in this study have sufficient strength to withstand the predefined mass load and provide the most region for vibration isolation. The two proposed design parameters can later be used for a major or minor tuning of lattice isolators for other specific applications.

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Section: Part 1: Static Compression Testmentioning

confidence: 85%

Correlation of design parameters of lattice structure for highly tunable passive vibration isolator

Azmi

Ismail

Putra

2022

Journal of Vibration and Control

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“…Compressive performance of the 3D novel tetrahedral lattice materials compared with those well‐known materials. [ 29–35 ] …”

Section: Resultsmentioning

confidence: 99%

“…Compressive performance of the 3D novel tetrahedral lattice materials compared with those well-known materials. [29][30][31][32][33][34][35] performance and relatively reasonable density than those of other lattice materials. It is worth noting that the novel 3D tetrahedral lattice materials cover a rational density range with prominent strength, which may offer promising applications in various fields.…”

Section: Comparison Of 3d Tetrahedral Lattice Materials With Other Ce...mentioning

confidence: 95%

Experimental and Simulation Analysis on the Mechanical Behavior of 3D‐Enhanced Al‐Based Tetrahedral Lattice Materials

Xue

Huang

et al. 2022

Physica Status Solidi (a)

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Herein, the compressive mechanical behavior of novel 3D tetrahedral lattice materials is investigated by ways of experimental, numerical, and analytical methods with a good performance of accuracy. Samples with varied length–diameter ratios are fabricated through 3D printing combined with investment casting method. The compressive behavior, deformation characteristic, and energy property of the lattice materials are comprehensively recorded and analyzed with respect to the geometric parameter and compression directions. It is observed that the length–diameter ratio exhibits a significant influence on the mechanical performance and energy absorption of the materials, that is, the lower the length–diameter ratio, the higher the relative density, strength, and energy absorption. Good agreements are observed among the experimental, numerical, and analytical results within a relative acceptable error. Moreover, the mechanical properties and deformation characteristics of lattice materials depend on compression directions to a great extent. In addition, the novel tetrahedral lattice materials with reasonable relative density present superior performance features compared with the other cellular materials.

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“…Ashby chart for the proposed structure compared with other structures: foams made of aluminum, 33 polymer, 34 zinc, 35 steel 36 ; honeycombs based on aluminum, 37 steel 38 ; Graded auxetic structure 39 ; 2D and 3D re-entrant structure 23,40 ; 2D and 3D re-entrant chiral structure, 3,41 and steel tubes. 1 …”

Section: Resultsmentioning

confidence: 99%

“…Also, unlike the common energy absorption structures, the initial peak crushing force is almost flat. Since the energy absorption properties can be controlled by changing the geometric parameters, the Graded auxetic structure 39 ; 2D and 3D re-entrant structure 23,40 ; 2D and 3D re-entrant chiral structure, 3,41 and steel tubes. 1…”

Section: Discussionmentioning

confidence: 99%

Experimental and numerical analysis of a novel 3D re-entrant auxetic structure

Lotfi

Masoumi

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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The energy absorption performance during collisions and crushing is one of the critical parameters in the design of vehicle structures. Therefore, researchers are continually trying to improve the energy-absorbing properties of the crash box to reduce the force transmitted to the occupant during an accident. In this research, a novel three-dimensional re-entrant auxetic structure has been proposed to improve energy-absorbing performances. Criteria for evaluating energy absorption including the initial peak crushing force, energy absorption, mean crushing force, crushing force efficiency, and specific energy absorption, were obtained through numerical and experimental methods. The structure showed auxetic behavior in two transverse directions during compressive loading and absorbed more energy. The force-displacement curve showed low initial peak crushing force, and the structure collapsed uniformly during compressive loading. The effects of the angle of the diagonal strut with the vertical axis, the thickness of the struts, and the ratio of horizontal strut length to diagonal strut length on the energy absorption properties of the structure were studied, too.

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Dynamic Performance of a 3D Re-entrant Structure

Cited by 49 publications

References 28 publications

Correlation of design parameters of lattice structure for highly tunable passive vibration isolator

Correlation of design parameters of lattice structure for highly tunable passive vibration isolator

Experimental and Simulation Analysis on the Mechanical Behavior of 3D‐Enhanced Al‐Based Tetrahedral Lattice Materials

Experimental and numerical analysis of a novel 3D re-entrant auxetic structure

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