Deformation localisation modelling of polymer foam microstructure under compression: A new approach by discrete element modelling
Deformation localisation modelling of polymer foam microstructure under compression: A new approach by discrete element modelling
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DOI：
10.1016/j.compstruct.2009.09.008
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发表时间：
2010
影响因子：
6.3
通讯作者：
P. Viot;R. Bouix;I. Iordanoff;J. Lataillade
中科院分区：
文献类型：
--
作者：
P. Viot;R. Bouix;I. Iordanoff;J. Lataillade
本文建立了一个离散元模型（DEM），用以描述由闭孔组成的聚合物多孔材料的微观结构行为。在DEM中，聚合物泡沫被表示为模拟闭孔的颗粒的集合体。颗粒的行为是基于吉布森模型，并取决于形态和机械参数。目前的数值研究表明，变形局部化的微观结构的影响。结果表明，细胞形态参数和不同大小细胞在试样中的分布对局部变形有显著影响。宏观断层的影响也进行了研究。
A discrete element model (DEM) has been developed to represent the behaviour of the microscopic structure of polymer cellular material, consisting of closed-cells. In DEM, the polymer foam is represented as an assembly of particles which model the closed-cells. The behaviour of the particle is based on the Gibson model and depends on morphologic and mechanical parameters. The present numerical study demonstrates the effect of deformation localisation on the microstructure. It is noted that the cell morphologic parameters and the distribution of various size cells in the specimen have a significant influence of the local deformation. The effect of macroscopic faults is also studied.