Modelling and numerical investigations of the mechanical behavior of polyurethane under the influence of moisture
Modelling and numerical investigations of the mechanical behavior of polyurethane under the influence of moisture
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DOI：
10.1007/s00419-014-0943-x
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发表时间：
2015-08-01
影响因子：
2.8
通讯作者：
Diebels, Stefan
中科院分区：
文献类型：
--
作者：
Goldschmidt, Florian;Diebels, Stefan
本文研究了一种粘弹性弹性体，探讨了湿度对其力学行为的影响。单轴松弛试验在室温下进行不同水平的水分含量。该模型包括一个有限的粘弹性和不可压缩的方法，其中的机械参数耦合到水分含量。对于数值研究，所有必要的平衡和本构方程都在开源C++有限元代码deal.II中实现（Bangerth等人，ACM Trans Math Softw 33（4）：24/1-24/27 2007）。借助该实施方案，并通过比较干燥、中间和完全饱和试样的实验结果以及从模拟中获得的结果，可以确定所用聚合物的精确材料参数。
In the present paper, a viscoelastic elastomer is investigated with respect to the influence of moisture on its mechanical behavior. Uniaxial relaxation tests are executed at room temperature with different levels of moisture content. The model consists of a finite viscoelastic and incompressible approach wherein the mechanical parameters are coupled to the moisture content. For numerical investigations, all necessary balance and constitutive equations are implemented in the open-source C++ finite element code deal.II (Bangerth et al. in ACM Trans Math Softw 33(4):24/1-24/27 2007). With the help of this implementation and by comparing experimental results for dry, intermediate and fully saturated specimens and the results gained from simulations, the precise material parameters of the used polymer can be identified.