Models for the compressibility of layered polymeric sponges
Models for the compressibility of layered polymeric sponges
复制标题
层状聚合物海绵的可压缩性模型
DOI：
--
复制
发表时间：
1991
期刊：
影响因子：
--
通讯作者：
M. Peleg
中科院分区：
文献类型：
--
作者：
S. Swyngedau;A. Nussinovitch;M. Peleg
海绵及其层状阵列的特征S形压缩应力-应变关系由两种具有三个实验确定的参数的数学模型描述。由于海绵压缩并不伴随着显著的横截面积膨胀，因此假设多层阵列中的应力在每层中是相同的。这使得能够根据各个层的参数及其已知厚度来预测阵列的应力-应变关系。通过两种双层聚氨酯海绵阵列的实验数据证明了该方法的适用性。结果表明，阵列的压缩行为可以令人满意地预测的数学形式的模型，无论是表示为工程应变或Hencky的应变。
The characteristic sigmoid compressive stress-strain relationships of sponges and their layered arrays are described by two kinds of mathematical models having three experimentally determined parameters. Since sponge compression is not accompanied by a significant cross-sectional area expansion, it was assumed that the stress in a multilayered array is the same in each layer. This enables prediction of the array's stress-strain relationship from the parameters of the individual layers and their known thickness. The applicability of the method is demonstrated with experimental data of two kinds of double-layered arrays of polyurethane sponges. It is shown that the arrays' compressive behavior can be satisfactorily predicted irrespective of the mathematical form of the model and whether the strain is expressed as engineering strain or Hencky's.