Abstract The temperature and strain rate dependence of the tensile behaviors of uncured carbon black-filled rubber are investigated through quasi-static mechanical tests under different loading scenarios. The significant influences of both the temperature and strain rate on the distinct deformation characteristics (hysteresis, stress level at a certain stretch, and the Mullins effect) during the tensile process are systematically discussed and explained microscopically. An interpretation of the underlying physical mechanisms of uncured carbon black filled rubber is proposed, which is similar to that of vulcanized rubber. Based on this interpretation, a thermomechanical constitutive model is developed to represent the complex constitutive behaviors of uncured rubber. Using this new model, the distinct characteristics of the cyclic tests can be accurately captured over a wide range of temperatures and strain rates. Moreover, the experimental fitting results under selected working conditions can effectively predict the other experimental results.

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温度和应变速率对未硫化橡胶张力响应的影响：实验和建模

摘要 通过准静态力学试验，研究了未固化炭黑填充橡胶拉伸行为的温度和应变率依赖性。系统讨论了温度和应变速率对拉伸过程中不同变形特性（滞后、特定拉伸应力水平和穆林斯效应）的显着影响，并从微观上进行了解释。提出了对未硫化炭黑填充橡胶的潜在物理机制的解释，这类似于硫化橡胶的物理机制。基于这种解释，开发了一个热机械本构模型来表示未硫化橡胶的复杂本构行为。使用这个新模型，可以在很宽的温度和应变率范围内准确捕获循环测试的独特特征。此外，选定工况下的实验拟合结果可以有效地预测其他实验结果。