一种表征乙丙二烯单体橡胶温度依赖性行为的超粘-伪弹性模型

IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL
Dianjie Jiang, Zhiping Tu, Zhanjiang Wang
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引用次数: 0

摘要

建立了橡胶的超粘-伪弹性模型,该模型可用于模拟橡胶的应变率效应、温度效应和Mullins效应等力学行为。该模型结合了Yeoh超弹性模型、proony系列线性粘弹性理论和Ogden-Roxburgh拟弹性材料模型。温度效应通过弛豫时间、弛豫量和伪弹性参数与温度的关系来反映。为了通过实验有效地确定模型参数,提供了基于有限时间增量的数值应力解,允许结合橡胶实验直接获得模型参数。采用三元乙丙橡胶(EPDM)进行了应力松弛和加载卸载实验,验证了模型的有效性。利用数值应力解和灰狼优化(GWO)算法对得到的实验数据进行拟合,得到本构模型参数。所有实验曲线的\({R}^{2}\)值均大于0.985,证明了拟合的准确性。此外,通过在与拟合温度不同的温度下进行实验来评估模型的预测能力。结果表明,实验曲线与预测曲线之间的\({R}^{2}\)值大于0.986。结果的一致性较好,表明该模型具有较高的适用性,可以用较少的实验拟合材料参数,预测其他工况下的实验结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A hyper-visco-pseudo-elastic model to characterize the temperature-dependent behavior of ethylene propylene diene monomer rubber

A hyper-visco-pseudo-elastic model to characterize the temperature-dependent behavior of ethylene propylene diene monomer rubber

A hyper-visco-pseudo-elastic model of rubber is presented, which is applied to model various mechanical behaviors, including strain rate effect, temperature effect, and the Mullins effect. The proposed model combines the Yeoh hyperelastic model, the linear viscoelastic theory of Prony series, and the Ogden–Roxburgh pseudo-elastic material model. The temperature effect is reflected by associating relaxation time, relaxation amount, and pseudo-elastic parameters with temperature. To determine model parameters effectively through experiments, a numerical stress solution based on finite time increments is provided, allowing the incorporation of rubber experiments to obtain model parameters directly. Stress relaxation and loading and unloading experiments are conducted using ethylene propylene diene monomer (EPDM) rubber to validate the proposed model. The obtained experimental data are fitted using the numerical stress solution and the gray wolf optimization (GWO) algorithm, yielding the constitutive model parameters. The fitting accuracy is demonstrated by \({R}^{2}\) values exceeding 0.985 for all experimental curves. Furthermore, the model's predictive capability is evaluated by conducting experiments at temperatures different from the fitting temperature. The results exhibit \({R}^{2}\) values greater than 0.986 between the experimental and predicted curves. The good consistency of the results indicates that the proposed model has a high applicability potential, and it can fit material parameters with less experiments to predict the experimental outcomes under other working conditions.

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来源期刊
Colloid and Polymer Science
Colloid and Polymer Science 化学-高分子科学
CiteScore
4.60
自引率
4.20%
发文量
111
审稿时长
2.2 months
期刊介绍: Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.
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