Honeycomb failure processes under in-plane loading

Cricrı̀, G.; Perrella, Michele; Cali, Calogero

doi:10.1016/j.compositesb.2012.07.032

Cited by 55 publications

(21 citation statements)

References 12 publications

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“…The experimental results showed that the dynamic crushing strength was significantly higher than the quasi-static crushing strength. Cricrì et al [6], Papka and Kyriakides [7], and Ruan et al [8] investigated the behavior of regular hexagonal honeycombs under in-plane loading using numerical simulations. The results show that the numerical methods can provide high fidelity predictions of the deformation modes and the crushing forces of the honeycomb topology.…”

Section: Introductionmentioning

confidence: 99%

In-plane crashworthiness of bio-inspired hierarchical honeycombs

Yin

Huang

Scarpa

et al. 2018

Composite Structures

101

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Biological tissues like bone, wood, and sponge possess hierarchical cellular topologies, which are lightweight and feature an excellent energy absorption capability. Here we present a system of bio-inspired hierarchical honeycomb structures based on hexagonal, Kagome, and triangular tessellations. The hierarchical designs and a reference regular honeycomb configuration are subjected to simulated in-plane impact using the nonlinear finite element code LS-DYNA. The numerical simulation results show that the triangular hierarchical honeycomb provides the best performance compared to the other two hierarchical honeycombs, and features more than twice the energy absorbed by the regular honeycomb under similar loading conditions. We also propose a parametric study correlating the microstructure parameters (hierarchical length ratio r and the number of sub cells N) to the energy absorption capacity of these hierarchical honeycombs. The triangular hierarchical honeycomb with N = 2 and r = 1/8 shows the highest energy absorption capacity among all the investigated cases, and this configuration could be employed as a benchmark for the design of future safety protective systems.

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Section: Introductionmentioning

confidence: 99%

In-plane crashworthiness of bio-inspired hierarchical honeycombs

Yin

Huang

Scarpa

et al. 2018

Composite Structures

101

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“…Cellular structure is widely used to improve crashworthiness in the design of vehicle body because of lightweight and good energy absorption ability [1,3,4]. To work on properties of cellular structure, the most common method is to describe the effective mechanical properties by elastic constitutive of unit cell assuming that it is the continuous medium [5].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: The Nonlinear Compressive Response and Deformation of an Auxetic Cellular Structure under In-Plane Loading

Zhang

Hou

et al. 2014

Advances in Mechanical Engineering

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At the request of the Author, the following article Zhang, W, Hou, W, Hu, Ping and Ma, Z (2014) The Nonlinear Compressive Response and Deformation of an Auxetic Cellular Structure under In-Plane Loading Advances in Mechanical Engineering published 17 November 2014. doi: 10.1155/2014/214681has been retracted due to errors discovered by the authors. On Page 3, the definition of component force in Equation 4 is incorrect. (2) On Page 4, the definition of component force in Equation 11 is incorrect. Moreover this equation should not have parameterM(length of cell wall), because a mistake was made in the process of calculation. Because of the above reasons, the conclusion obtained from the mechanical model is incorrect and should instead state that the Elastic Buckling and Plastic Collapse are both yield modes of this structure (3) On Page 5, the FEA model used in this article is not appropriate, because the deformation of single cell is not homogeneous, which means that the geometrical non-linear effect on single cell model is greater. So in the actual whole structure we may not obtain the results that were described in Page 6 Paragraph 2. (4) The data in figures 8 (page 6) and 9 (page 7) is incorrect and the values of effective Young’s modulus and plateau stress are much larger than reasonable values. The definition of effective stress is wrong in the FEA model, which means the effective stress should be calculated by the total width of cell instead of length of horizontal cell wall. For example, in Figure 8, the plateau stress can reach 140Mpa, this is not reasonable because there are many holes in this cellular structure, and its mechanical properties should be much lower than material properties of cell wall. The reasonable plateau stress should be around 2Mpa. The authors takes responsibility for these errors and regret the publication of invalid results. The nonlinear compressive response and deformation of an auxetic cellular structure that has periodic negative Poisson's ratio (NPR) cell were studied through theoretical and numerical method. The in-plane deformation and process of absorbing energy of this NPR cellular structure were discussed. The relative density of NPR cell was determined by geometric parameters and a theoretical approach to the strength of NPR cell was carried out to analyze the failure process under in-plane compression. Thus, to prove the effective of unit cell mechanical model, the size effect of this NPR cellular structure was discussed. The simulations of two different NPR cellular structures under in-plane compression were generated and their effective properties, strain-stress curves, and absorbed energy were analyzed. It can be concluded that the NPR cell that has lower relative density may have better capability of absorbing energy with enhanced Young's modulus. Finally the parametric analyses related to relative density were presented with NPR unit cell model and a set of quasistatic compressive experiments was carried out, which can be used to reveal the nonlinear properties of NPR cellular structure and to prove the effectiveness of theoretical method.

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“…When the impact velocity is low, the crushing stress at both sides is almost the same, while there will be much deviation at moderate or high velocity, so Reid and Peng [46] proposed the one dimensional shock wave theory based on R-P-P-L model to characterize the response of wood under high velocity, when substituting the Eqs. (11) and (13) into Eq. (12), the stress at the impact side can be obtained as Fig.6a gives the variations of the plateau stress at different impact velocities, and based on Fig.6a, the analytical prediction of Eqs.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 98%

“…Considerable experimental and numerical studies have been conducted to investigate the dynamic behavior of cellular materials [1][2][3][4][5][6][7][8][9][10][11][12]. The deformation, crushing stress and energy absorption as well as the cell geometric topology of the uniform cellular materials have been studied systematically.…”

Section: Introductionmentioning

confidence: 99%