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Numerical Modeling of the Compression Process of Elastic Open-cell Foams

机译：弹性开孔泡沫压缩过程的数值模拟

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摘要

The random models of open-cell foams that can reflect the actual cell geometrical properties are constructed with the Voronoi technique. The compression process of elastic open-cell foams is simulated with the nonlinear calculation module of finite element analysis program. In order to get the general results applicable to this kind of materials, the dimensionless compressive stress is used and the stress-strain curves of foam models with different geometrical properties are obtained. Then, the influences of open-cell geometrical properties, including the shape of strut cross section, relative density and cell shape irregularity, on the compressive nonlinear mechanical performance are analyzed. In addition, the numerical results are compared with the predicted results of cubic staggering model. Numerical results indicate that the simulated results reflect the compressive process of foams quite well and the geometrical properties of cell have significant influences on the nonlinear mechanical behavior of foams.
机译：可以反映实际孔几何特性的开孔泡沫的随机模型是使用Voronoi技术构建的。利用有限元分析程序的非线性计算模块，模拟了弹性开孔泡沫的压缩过程。为了获得适用于这种材料的一般结果，使用了无量纲的压缩应力，并获得了具有不同几何特性的泡沫模型的应力-应变曲线。然后，分析了开孔几何特性，包括支杆横截面的形状，相对密度和孔格形状不规则性，对压缩非线性力学性能的影响。此外，将数值结果与立方交错模型的预测结果进行了比较。数值结果表明，模拟结果很好地反映了泡沫的压缩过程，泡孔的几何特性对泡沫的非线性力学行为有重要影响。

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