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Numerical prediction and experiment on rubber creep and stress relaxation using time-dependent hyperelastic approach

机译：时变超弹性方法对橡胶蠕变和应力松弛的数值预测与实验

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摘要

Rubber is an excellent material for anti-vibration components in industry with a long term service. However, its time-dependent behaviour is undesirable in engineering applications. This article presents an engineering approach to evaluate the time-dependent responses, i.e., creep and stress relaxation, for rubber anti-vibration components. A time-dependent damage function was introduced into hyperelastic models. This function can be expressed in three forms. A typical rubber product and a dumbbell specimen were selected to validate the proposed approach. It has been shown that the predictions obtained from this method are consistent with the experimental data. It has also been established that the time dependent response of industrial products can be predicted based on the responses from simple specimens, e.g., dumbbell specimen. In addition, it is possible to obtain a creep response based on a relaxation response and vice versa (by changing K value only) using the proposed approach, which has also been observed experimentally in the literature. The proposed function can also be easily incorporated into commercial finite element software (e.g., Abaqus). It has been demonstrated that the proposed method may be used at an appropriate design stage. Finally, the readers can select one of the three forms presented to perform assessments on the time-dependent responses evaluations for rubber anti-vibration products. (C) 2016 Elsevier Ltd. All rights reserved.
机译：橡胶是工业上抗振动部件的优良材料，可长期使用。但是，其随时间变化的行为在工程应用中是不可取的。本文提出了一种工程方法来评估橡胶抗振组件的时变响应，即蠕变和应力松弛。时间相关的损伤函数被引入到超弹性模型中。此功能可以三种形式表示。选择了典型的橡胶产品和哑铃样本来验证所提出的方法。已经表明，从该方法获得的预测与实验数据一致。还已经确定，可以基于简单样本（例如哑铃样本）的响应来预测工业产品的时间依赖性响应。此外，有可能使用所提出的方法基于松弛响应获得蠕变响应，反之亦然（仅通过更改K值），这在文献中也已通过实验观察到。所提出的功能还可以容易地并入商业有限元软件（例如，Abaqus）中。已经证明，所提出的方法可以在适当的设计阶段使用。最后，读者可以从三种形式中选择一种，以对橡胶防振产品的时变响应评估进行评估。 （C）2016 Elsevier Ltd.保留所有权利。

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