Modelling of a Cellular Rubber with Nonlinear Viscosity Functions
Modelling of a Cellular Rubber with Nonlinear Viscosity Functions
复制标题
具有非线性粘度函数的多孔橡胶建模
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Diebels
中科院分区：
文献类型：
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作者：
N. Koprowski;M. Johlitz;S. Diebels
本文研究了多孔炭黑填充橡胶的单向拉伸性能。在实验现场，主要关注的焦点在于Mullins效应、触变性和粘弹性行为。由于泡沫橡胶的两相特性，本文考虑了多孔介质理论。适当的预处理可以消除Mullins效应。因此，它不包括在材料模型中。基本弹性的本构模型是基于一个多项式的方法为不可压缩的材料，它是由体积项扩展到包括结构的可压缩性。最后，有限粘弹性的概念被应用于引入一个中间配置。非线性松弛函数用于模拟依赖于过程的松弛时间，模拟触变性和高度非线性行为的变形和进给速度。使用随机识别算法估计模型的材料参数。
In this paper a porous carbon black-filled rubber is investigated under uniaxial tension. On the experimental site the main focus of attention lies on the Mullins effect, the thixotropic and the viscoelastic behaviour. Because of the two phase character of cellular rubber, the Theory of Porous Media is taken into account. Performing a proper preconditioning, the Mullins effect can be eliminated. Hence, it is not included in the material model. The constitutive model for the basic elasticity is based on a polynomial approach for an incompressible material which is expanded by a volumetric term to include the structural compressibility. Finally, the concept of finite viscoelasticity is applied introducing an intermediate configuration. Nonlinear relaxation functions are used to model the process dependent relaxation times, to simulate the thixotropy and the highly nonlinear behaviour concerning the deformation and feedrate. The material parameters of the model are estimated using a stochastic identification algorithm.