Shear and bending performance of new type enhanced lattice truss structures

Feng, Li-Jia; Xiong, Jian; Yang, Lihong; Yu, Guo-Cai; Yang, Wen; Wu, Linzhi

doi:10.1016/j.ijmecsci.2017.10.045

Cited by 79 publications

(27 citation statements)

References 31 publications

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“…Feng et al. [10,11] designed and fabricated a new type enhanced lattice truss structures with a novel method and investigated its compressive properties, shear strengths, and bending failure loads theoretically and experimentally, proving the hourglass core sandwich structures are more excellent than typical pyramidal one. Based on the asymptotic expansion method, Buannic et al.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis, active and passive vibration control of double-layer hourglass lattice truss structures

Guo

Yang

Zhang

2018

Jnl of Sandwich Structures & Materials

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Although single-layer sandwich materials have been extensively studied in the engineering field, multilayered sandwich structures have rarely been concerned, especially on their dynamic analysis or vibration control. In this study, the dynamics of a double-layer hourglass sandwich beam is investigated by an improved method developed to simplify the calculations. The active vibration control is also analyzed. By using Hamilton’s principle, the governing equations are derived and the natural frequencies are calculated by our improved method. The results have been validated by comparing with the data obtained by traditional method, and finite element method. The contributions of both structural and material parameters on the dynamics of the double-layer sandwich beam are also investigated. The velocity feedback control method is employed to act as controllers on vibration suppressing of the sandwich structure actively. Further, nonlinear energy sink is used to control the vibration of the sandwich structure passively.

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Section: Introductionmentioning

confidence: 99%

Dynamic analysis, active and passive vibration control of double-layer hourglass lattice truss structures

Guo

Yang

Zhang

2018

Jnl of Sandwich Structures & Materials

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“…In Figure 8(b), shear peak strength of age-hardened lattice cores is superior to that of other cores structures at low densities (0.046–0.124 g/cm 3 ). At the density about 0.08 g/cm 3 , the shear peak strength of enhanced lattice cores is about 89% higher than that of the lattice truss cores fabricated from 304 stainless steel [21]. Thus, aluminum alloys provide better load capacities in enhanced lattice truss cores than stainless steels.…”

Section: Discussionmentioning

confidence: 99%

“…[19]. In previous work by the current authors [20,21], the enhanced lattice truss sandwich structure was first manufactured using 304 stainless steel, the compressive and bending strengths of which were superior to those of stainless–steel pyramidal lattice truss sandwich structures. However, these metallic lattice truss sandwich structures remained in the as-brazed condition (i.e.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and mechanical properties of three-dimensional enhanced lattice truss sandwich structures

Yang

Xiong

Feng

et al. 2018

Jnl of Sandwich Structures & Materials

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Topological-reinforcement and material-strengthening were used and employed to improve the mechanical properties of lattice truss sandwich structures. This new type of three-dimensional aluminum alloy lattice truss (named enhanced lattice truss) sandwich structure, with a relative density ranging from 1.7% to 4.7%, was designed and fabricated by interlocking and vacuum-brazing method. The out-of-plane compression and shear properties of the enhanced lattice truss sandwich structures (both as-brazed and age-hardened cores) were experimentally and analytically investigated. Good correlations between analytical predictions and experiment results were achieved. Experimental results showed that the mechanical properties of the enhanced lattice truss cores were sensitive to the unit-cell size and parent-alloy properties (i.e. inelastic buckling and tangential modulus). The compressive and shear characteristics of enhanced lattice truss sandwich structures were discussed and found superior to competing lattice truss structures in low density area (0.046–0.124 g/cm3) of material property charts. The combination of topological-reinforcement and material-strengthening provided a way to achieve lightweight sandwich structures with high specific strengths and low densities.

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“…Results show that both the relative density and the geometrical features of the representative volume element (RVE) strongly affect the equivalent macroscopic elastic behavior of the lattice. In particular, they are useful for modeling lightweight sandwich panels with a lattice core and facings [ 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. However, the use of inclusions, as shown in Figure 3 , should be considered for modeling dowels whose withdrawal strength is dependent on the mounting and friction forces [ 44 , 45 , 46 , 47 , 48 ].…”

Section: Methodsmentioning

confidence: 99%

Experimental and Numerical Study on Withdrawal Strength of Different Types of Auxetic Dowels for Furniture Joints

2020

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Studies on the application of the auxetic metamaterials and structures in furniture joints are very limited. However, they have huge potential for use in ready-to-assemble furniture. This study aimed to design and produce different types of auxetic dowels in 3D printing technology, and experimentally and numerically analyze the withdrawal strength of these dowels. In the scope of the study, 24 auxetic dowels with different types and size of inclusions, a different diameter of holes, and a non-auxetic reference dowel were designed and produced with appropriate muffs. Dowels were 3D printed from polyamide (PA12). Poisson’s ratios, withdrawal strength, contact pressures, and friction coefficients of dowels were determined theoretically by means of numerical analyses and real static compression tests. After the pre-production of dowels, the dowels with triangular inclusions have not been found to have sufficient strength and stiffness. Withdrawal strength of dowels decreased as the size of inclusions is decreased, or dowel hole diameter is increased. Furthermore, contact pressures and stresses in auxetic dowels were considerably lower than non-auxetic dowels under the withdrawal force.

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Shear and bending performance of new type enhanced lattice truss structures

Cited by 79 publications

References 31 publications

Dynamic analysis, active and passive vibration control of double-layer hourglass lattice truss structures

Dynamic analysis, active and passive vibration control of double-layer hourglass lattice truss structures

Fabrication and mechanical properties of three-dimensional enhanced lattice truss sandwich structures

Experimental and Numerical Study on Withdrawal Strength of Different Types of Auxetic Dowels for Furniture Joints

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