Rubber components produced from nitrile butadiene rubber (NBR) are changing their material properties due to environmental influences. This is caused by irreversible changes occurring in the elastomer network which is known as chemical ageing. In this paper, ageing behaviour of NBR is investigated and modelled under the influence of different surrounding media as air and oil. Based on the previous works, in which chemical ageing was also modelled, a continuum mechanical approach is introduced here, whereby the rubber viscoelasticity is taken into account. Simulations using FEM are then carried out under different chemical and mechanical boundary conditions, and the proposed modelling approach is validated by means of tension set measurements.

中文翻译：

---

关于丁腈橡胶的老化行为：化学机械实验，拉伸变形的建模和模拟

由于环境因素的影响，由丁腈橡胶（NBR）生产的橡胶组件正在改变其材料性能。这是由于弹性体网络中发生不可逆的变化（称为化学老化）引起的。本文研究了丁腈橡胶的老化行为，并在空气和油等不同周围介质的影响下进行了建模。基于以前的工作（其中还模拟了化学老化），此处介绍了一种连续力学方法，其中考虑了橡胶的粘弹性。然后在不同的化学和机械边界条件下使用FEM进行模拟，并通过张力集测量验证了所提出的建模方法。