Quasi-static and dynamic behavior of sandwich panels with multilayer gradient lattice cores

Yang, Lihong; Sui, Lei; Dong, Yalun; Li, Xuyang; Zi, Fan; Zhang, Zexu; Yang, Shuo; Jiang, Yang; Wu, Linzhi

doi:10.1016/j.compstruct.2020.112970

Cited by 25 publications

(5 citation statements)

References 32 publications

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“…Then, the compression load curve rises again, reaches a peak for the second time, and then gradually decreases. This is owing to the hardening of the base material in the deformation process, which improves the mechanical performance of the core; this is consistent with the results of some existing tests [ 46 ]. Finally, during the dense compression process of the core, the compressive load curve continues to rise until structural failure.…”

Section: Resultssupporting

confidence: 90%

Experimental and Numerical Study on Impact Behavior of Hourglass Lattice Sandwich Structures with Gradients

Wu,

Qu,

2023

Materials

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The impact mechanical properties of graded hourglass lattice sandwich structures under impact compression were studied using experiments and numerical simulations. The influence of the gradient distribution on the deformation mode, peak load, and energy absorption capacity of the hourglass lattice sandwich structure under the same impact energy level, different impact masses, and different impact velocities is discussed. The results show that the difference in impact mass and velocity has a significant effect on the impact mechanical properties of the graded hourglass lattice sandwich structure under the same impact energy level. The gradient distribution mode is a factor that requires careful consideration in the design. A reasonable gradient distribution design can control the initial and compression peak loads to achieve similarly low values and improve the load consistency of the hourglass lattice sandwich structure. The total energy absorption of the hourglass lattice sandwich structures with different gradient distributions is the same; however, the energy absorption capacity is different at different deformation stages. When the moving distance is 0.005 m, the gradient hourglass lattice sandwich structures with the mass decline distribution can absorb 1 kJ/kg more energy than the gradient hourglass lattice sandwich structures with the mass increment distribution. When the moving distance is 0.037 m, the mass decline distribution gradient hourglass lattice sandwich structures absorb 1 kJ/kg less energy than the mass increment distribution gradient hourglass lattice sandwich structures.

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Section: Resultssupporting

confidence: 90%

Experimental and Numerical Study on Impact Behavior of Hourglass Lattice Sandwich Structures with Gradients

Wu,

Qu,

2023

Materials

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“…The relative density of the pyramid cells can be determined from their geometric dimensions as shown in Figure 1A. The expression for the relative density is as follows 35

ρ_{s} goodbreak= \frac{ρ_{f}}{ρ} goodbreak= \frac{V_{s}}{V} goodbreak= \frac{2 a ([], 3 italicth goodbreak- 2 \sqrt{2} b ((), H goodbreak- h goodbreak- h_{1})) - a^{2} h}{{(L / \sqrt{2})}^{2} H},

where

V_{s}

is the volume of all the pillars in the pyramid unit cell and V is the spatial volume occupied by the pyramid unit cell.…”

Section: Methodsmentioning

confidence: 99%

An experimental and numerical investigation into compressive failure of pyramidal lattice sandwich structures fabricated using stereolithography technology

Zhai,

Wang,

et al. 2024

Fatigue Fract Eng Mat Struct

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The pyramid lattice sandwich structure, characterized by high load‐bearing capacity, lightweight nature, and fully open internal space, is considered an extremely promising super‐strong structure. Stereolithography technology was utilized to achieve the monolithic formation of single‐layer multi‐cell pyramidal lattice sandwich structures. Quasi‐static compression tests and finite element simulations were conducted to characterize the compressive properties and failure modes. Results indicate that the compressive strength, compressive modulus, specific strength, and specific stiffness of the single‐layer multi‐cell pyramidal lattice sandwich structure increase as the relative density increases. Moreover, fracture failure was observed in the structures with various relative densities. Additionally, the compressive failure of multi‐layer density gradient pyramidal lattice sandwich structures was investigated. Experimental and numerical findings indicate that the optimal density gradient scheme for the ZCMLG structure is I‐III‐II, resulting in a peak compression force that is 342.14% and 288.55% higher than that of the ZAMLG and ZBMLG structures, respectively.

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“…The theoretical prediction results and the experimental results were analyzed, and the agreement was good. Yang et al [ 22 ] proposed a three-layer stainless steel truss core sandwich panel with a density gradient between the core layers of the sandwich panel by varying the cross-sectional dimensions of the core rods. A combination of experiments and numerical simulations was used to study the compression performance of the density gradient dot matrix sandwich panel.…”

Section: Introductionmentioning

confidence: 99%

Study on damage failure for a new double-triangular truss core sandwich structure

Zhongliang,

Sixin

2023

Heliyon

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Quasi-static and dynamic behavior of sandwich panels with multilayer gradient lattice cores

Cited by 25 publications

References 32 publications

Experimental and Numerical Study on Impact Behavior of Hourglass Lattice Sandwich Structures with Gradients

Experimental and Numerical Study on Impact Behavior of Hourglass Lattice Sandwich Structures with Gradients

An experimental and numerical investigation into compressive failure of pyramidal lattice sandwich structures fabricated using stereolithography technology

Study on damage failure for a new double-triangular truss core sandwich structure

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