Pressure Dependent Properties of a Compressible Polymer
Pressure Dependent Properties of a Compressible Polymer
复制标题
可压缩聚合物的压力相关特性
DOI：
10.1007/s11340-011-9489-9
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发表时间：
2012
影响因子：
2.4
通讯作者：
S. Diebels
中科院分区：
文献类型：
--
作者：
N. Koprowski;M. Johlitz;S. Diebels
本文涉及多孔炭黑填充橡胶的研究，并对其压力和张力行为进行了测试。在张力范围内仅进行单轴试验，而在压力范围内则进行单轴试验和水压试验。单轴实验是在定制的单轴装置中进行的，水压测试是在专门为此应用开发的压力室中进行的。本文清楚地描述了压力室的构造和使用。所有实验均与材料的基本弹性有关。此时完全忽略粘弹性行为。不仅讨论了实验，还研究了材料的建模。测试的多孔橡胶由不可压缩的固相和可压缩的气相组成。因此，观察到了所谓的结构压缩性。多孔橡胶的可压缩行为是一个重要的特性。因此本文的主要重点是压力测试和模拟。现有的类橡胶材料材料模型仅处理不可压缩的橡胶结构。为了表示可压缩行为，使用了多孔介质理论。本构模型基于不可压缩材料的多项式方法。这是通过体积膨胀项和压实点来补充的，以模拟结构压缩性。
This paper deals with the investigations of a porous carbon black-filled rubber, tested with regard to its pressure and tension behaviour. In the tension range only uniaxial tests are performed while in the pressure range uniaxial as well as hydrostatic tests are performed. The uniaxial experiments are carried out in a custom-made uniaxial device and the hydrostatic tests in a pressure chamber which is specially developed for this application. The construction and use of the pressure chamber is clearly described in this paper. All experiments are related to the basic elasticity of the material. The viscoelastic behaviour is completely disregarded at this point. Not only the experiments are discussed, also the modelling of the material is looked at. The tested cellular rubber is composed of an incompressible solid phase and a compressible gas phase. For that reason a so-called structural compressibility is observed. The compressible behaviour of cellular rubber is an important property. So the main focus of the paper is on the pressure tests and the simulation of these. The existing material models for rubber like materials only deal with incompressible rubber structures. To represent the compressible behaviour, the Theory of Porous Media is used. The constitutive model is based on a polynomial approach for an incompressible material. This is complemented by a volumetric expansion term with a point of compaction to model the structural compressibility.