Experimental characterization and modelling of the cyclic softening of carbon-black filled rubbers
Experimental characterization and modelling of the cyclic softening of carbon-black filled rubbers
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DOI：
10.1016/j.msea.2011.08.023
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发表时间：
2011-11
期刊：
影响因子：
6.4
通讯作者：
Yannick Merckel;J. Diani;M. Brieu;D. Berghezan
中科院分区：
文献类型：
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作者：
Yannick Merckel;J. Diani;M. Brieu;D. Berghezan
对几种炭黑填充苯乙烯-丁二烯橡胶 (SBR) 进行了大应变下的单轴拉伸循环测试，以研究填充橡胶的循环软化。为了研究材料成分（填料量和交联密度）和拉伸强度的影响，提出了一种循环软化表征的原始方法。软化被视为橡胶中拉伸的放大，然后引入拉伸放大因子作为软化参数。后者针对各种材料和几个级别的循环拉伸强度进行评估。材料软化随着负载强度、炭黑填料的量和交联密度的降低而增加。在建模方面，引入的软化参数提供了软化材料在任何循环中的整个应力-拉伸响应。因此，编写了一个模型来描述和预测填充橡胶在比例循环试验期间的应力-拉伸响应。
Several carbon-black filled styrene-butadiene rubbers (SBRs) were submitted to uniaxial tension cyclic tests at large strain for investigating filled rubbers cyclic softening. In order to study the effect of the material composition (amount of fillers and crosslink density) and of the stretch intensity, an original method for cyclic softening characterization is proposed. The softening is seen as an amplification of the stretch in the rubber gum, and a stretch amplification factor is then introduced as the softening parameter. The latter is evaluated for various materials and several levels of cyclic stretch intensity. Material softening is shown to increase with the loading intensity, the amount of carbon-black fillers and the decrease of the crosslink density. In terms of modelling, the introduced softening parameter provides access to the entire stress-stretch responses of the softened material for any cycle. Therefore, a model is written for the description and the prediction of the stress-stretch responses of filled rubbers during proportional cyclic tests.