交联橡胶Polymer链断裂的损伤模型及拉伸实验
Damage of Cross-Linked Rubbers as the Scission of Polymer Chains: Modeling and Tensile Experiments
摘要：
本文基于高分子链断裂的概念，建立了一个非填充交联橡胶的损伤模型。该模型是建立在著名的Gent弹性势补充的动力学方程描述的高分子断链的影响。损伤模型中的宏观参数通过未损伤弹性体的参数来评估。定性分析下断裂的聚合物链的橡胶分子参数的变化导致容易缩放模型这些参数的损伤因子的依赖性。这使得有可能预测橡胶的机械脱硫化在分子方面的失败。对该模型进行了单调加载和反复加载-卸载的准静态拉伸试验。
英文摘要：
This paper develops a damage model for unfilled cross-linked rubbers based on the concept of scission of polymer chains. The model is built up on the well-known Gent elastic potential complemented by a kinetic equation describing effects of polymer chain scission. The macroscopic parameters in the damage model are evaluated through the parameters for undamaged elastomer. Qualitative analysis of changing molecular parameters of rubbers under scission of polymer chains resulted in easy scaling modeling the dependences of these parameters on the damage factor. It makes possible to predict the rubber failure in molecular terms as mechanical de-vulcanization. The model was tested in tensile quasi-static experiments with both the monotonous loading and repeated loading-unloading.
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