Hydrolytic Aging in Rubber-Like Materials: A Micro-Mechanical Approach to Modeling

A. Bahrololoumi, R. Dargazany
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引用次数: 12

Abstract

The effect of hydrolytic aging on mechanical responses of Rubber likes materials, in particular, Mullins effect and the permanent set has been modeled. Hydrolytic aging is considered as the result of the competition between two phenomena (1) chain scission and (2) cross-link scission/reformation. Both phenomena were modeled and thus, the strain energy of the polymer matrix is written with respect to three independent mechanisms; i) the shrinking original matrix which has not been attacked by water, ii) conversion of the first network to a new network due to the reduction of the crosslinks, and iii) energy loss from network degradation due to water attacks to ester groups. The model is validated with respect to a set of experimental data. Besides accuracy, the simplicity and few numbers of fitting parameters make the model a good choice for further implementations.
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类橡胶材料的水解老化:微观力学建模方法
模拟了水解老化对类橡胶材料力学响应的影响,特别是Mullins效应和永久集效应。水解老化被认为是两种现象(1)链断裂和(2)交联断裂/重整)相互竞争的结果。这两种现象都建立了模型,因此,聚合物基体的应变能是根据三个独立的机制写成的;1)未被水攻击的原始矩阵的收缩,2)由于交联的减少,第一个网络转化为一个新的网络,3)由于水攻击酯基导致网络退化的能量损失。用一组实验数据对模型进行了验证。除了精度外,该模型的简单性和拟合参数的数量较少使其成为进一步实现的良好选择。
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