Collapse criteria of foam cells under various loading
Collapse criteria of foam cells under various loading
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不同载荷下泡沫孔的塌陷准则
DOI：
10.1002/pamm.201110174
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
V. Eremeyev
中科院分区：
文献类型：
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作者：
Ievdokymov M;H.Altenbach;V. Eremeyev
近年来，多孔材料在土木和机械工程中得到广泛应用。特别是，诸如金属和聚合物泡沫之类的多孔材料在轻质结构中具有应用。从力学的角度来看，泡沫可以表现出不寻常的行为，例如与泡沫细胞在某些载荷下屈曲相关的应变局部化。这项工作的目的是详细阐述考虑细胞塌陷的泡沫材料模型。我们考虑弹性不稳定期间单元塌陷的开始及其在负载下的进一步演变。泡沫的几何结构是使用 Voronoi 算法生成的。基于泡孔的随机分布，我们创建了各种泡沫几何模型。得到了泡沫材料的泡孔体积、壁厚和材料性能对临界载荷的影响。计算是使用 Abaqus CAD/CAE 系统进行的。 （© 2011 Wiley‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
Recently porous materials are widely used in civil and mechanical engineering. In particular, such porous materials as metal and polymer foams have applications in lightweight structures. From mechanics point of view foams can demonstrate unusual behavior such as strain localization related to foam cells buckling under certain loads.The aim of this work is the elaboration of the model of foam material taking into account the cell collapse. We consider the cell collapse initiation during the elastic instability and its further evolution under loading. The geometrical structure of foam is generated with the use of the Voronoi algorithm. Based on stochastic distributions of cells we create various geometrical models of foams. The influence of the cell volume, wall thicknesses and material properties of the foam material on critical loads is obtained. The calculations are performed with the use of Abaqus CAD/CAE system. (© 2011 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)