Dynamic crushing behavior of 3D closed-cell foams based on Voronoi random model

Song, Yanze; Wang, Zhi Hua; Zhao, Longmao; Luo, Jian

doi:10.1016/j.matdes.2010.04.007

Cited by 108 publications

(61 citation statements)

References 22 publications

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“…A preliminary study showed that using such an element size to model each cell wall was sufficient for convergence. The literatures (Li et al, 2014;Zheng et al, 2005;Li et al, 2007;Schaffner et al, 2000;Song et al, 2010) also applied the same method to ensure the success of the FE analysis. Following the references (Li et al, 2014;Li et al, 2007;Song et al, 2010;Papka and Kyriakides, 1994), the cell wall material of the model is taken to be the bilinear strainhardening material model, which is aluminum (Al) with the following properties: the density, Young's modulus, Poisson's ratio, yield stress and tangent modulus were assigned as 2.7×103 kg/m 3 , 69 GPa, 0.3, 76 MPa and 0.69 GPa, respectively.…”

Section: Finite Element Modelsmentioning

confidence: 99%

“…The literatures (Li et al, 2014;Zheng et al, 2005;Li et al, 2007;Schaffner et al, 2000;Song et al, 2010) also applied the same method to ensure the success of the FE analysis. Following the references (Li et al, 2014;Li et al, 2007;Song et al, 2010;Papka and Kyriakides, 1994), the cell wall material of the model is taken to be the bilinear strainhardening material model, which is aluminum (Al) with the following properties: the density, Young's modulus, Poisson's ratio, yield stress and tangent modulus were assigned as 2.7×103 kg/m 3 , 69 GPa, 0.3, 76 MPa and 0.69 GPa, respectively. Also, the behavior of the cell wall material is treated as rate-independent, as was done in the references (Ruan et al, 2003;Tan et al, 2005;Li et al, 2014;Zheng et al, 2005;Li et al, 2007;Song et al, 2010) The model was sandwiched between two rigid plates, as in Figure 1.…”

Section: Finite Element Modelsmentioning

confidence: 99%

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Dynamic crushing of uniform and density graded cellular structures based on the circle arc model

Zhang

Wei

Wang

et al. 2015

Lat. Am. j. solids struct.

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A new circle-arc model was established to present the cellular structure. Dynamic response of models with density gradients under constant velocities is investigated by employing Ls-dyna 971. Compared with the uniform models, the quasi-static plateau stress of different layers seems a significant parameter correlated with the deformation mode except for inertia effect when the density gradient is introduced. The impact velocity becomes much more vital on the deformation of the unit cell than the density gradient. The stress at both the impact and stationary sides is investigated in details. Furthermore, the stress-strain curve is compared with the modified shock wave theory. The density gradient does have some remarkable influence on the energy absorption capability, and a certain density gradient is not always beneficial to the energy absorption. Irrespective of the impact velocity, there seems always a critical strain where the energy absorbed by all these specimens could approximate to nearly the same value. So the critical strain-velocity curve is plotted and gives the beneficial area for energy absorption pertinent to density gradients and impact velocity.

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Section: Finite Element Modelsmentioning

confidence: 99%

Section: Finite Element Modelsmentioning

confidence: 99%

Dynamic crushing of uniform and density graded cellular structures based on the circle arc model

Zhang

Wei

Wang

et al. 2015

Lat. Am. j. solids struct.

Self Cite

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“…In the first step, the mechanical parameters of only one cell are determined in a simple analytic study. The mechanical response is then predicted using the finite elements method or finite volumes method or else the Vornoi technique which supposes a random distribution of different shape cells [19,20]. Finally, the model is adjusted by comparing the simulated response and experimental response.…”

Section: Symbolsmentioning

confidence: 99%

Quasi-static behavior identification of polyurethane foam using a memory integer model and the difference-forces method

Jmal

Dupuis

Aubry

2011

Journal of Cellular Plastics

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. Quasi-static behavior identification of polyurethane foam using a memory integer model and the difference-forces method. Journal of Cellular Plastics, SAGE Publications, 2011, pp.447-465 ABSTRACT: Flexible polyurethane (PU) foam is widely used in numerous comfort applications such as automotive seat cushions and mattresses. It would be interesting to design a mechanical model which describes the behaviour of this material in a series of test conditions. The present study is devoted to the modelling of the quasi-static behaviour of polyurethane foam using a memory integer model. Polyurethane foam undergoing large compressive deformation exhibits highly nonlinear elasticity and a viscoelastic behaviour. The memory integer model describes the nonlinearity in a polynomial function and the viscoelasticity through a convolution function. Uni-axial compression tests help to identify the mechanical parameters of the model. The difference between the force responses of foam in load and unload phases constitute the base element of the method used in this paper. Numerous precautions are taken into account to obtain accurate results which verify the thermodynamic conditions. Finally, the reliability as well as the limits of the memory integer model are discussed.

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“…Simone and Gibson [7] proposed a model and analysed the effect on stiffness and strength of closed-cell tetrakaidecahedral foams. Song et al [8] developed a model with tetrakaidecahedron cells to model the dynamic crushing behaviour of aluminium foams. Nonetheless, numerically modelling the mechanical properties of aluminum foams using uniform and closed-cell polyhedrons is still rare.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Mechanical Behaviour of Closed-cell Aluminium Foams Using a Representative Volume Element Method

Liu

Zhang

Yang

2016

MATEC Web of Conferences

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Abstract. In this study, a representative volume element (RVE) method is developed to capture the mechanical behaviour of aluminum foams under compressive loadings. Octadecahedrons are selected for forming cells of a microstructured RVE model to simulate mechanical behaviour of the aluminium foams under quasi-static compressive loadings. A convergence test is conducted to determine an appropriate mesh density. The stress-strain relationship obtained from the numerical simulations is compared to that from experimental study and agreements between these results demonstrate the efficiency of the proposed RVE model. Thereafter failure modes during a compressive loading process of the aluminum foams are also identified and discussed using this RVE model.

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Dynamic crushing behavior of 3D closed-cell foams based on Voronoi random model

Cited by 108 publications

References 22 publications

Dynamic crushing of uniform and density graded cellular structures based on the circle arc model

Dynamic crushing of uniform and density graded cellular structures based on the circle arc model

Quasi-static behavior identification of polyurethane foam using a memory integer model and the difference-forces method

Numerical Investigation on Mechanical Behaviour of Closed-cell Aluminium Foams Using a Representative Volume Element Method

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