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Time-temperature behavior of carbon/epoxy laminates under creep loading
Mechanics of Time-Dependent Materials ( IF 2.5 ) Pub Date : 2020-09-07 , DOI: 10.1007/s11043-020-09463-z
Heitor L. Ornaghi , José Humberto S. Almeida , Francisco M. Monticeli , Roberta M. Neves , Maria Odila H. Cioffi

The time-temperature creep behavior of advanced composite laminates is herein determined through a comprehensive set of experiments and analytical modeling. A complete structure versus property relationship is determined through a wide range of temperature and applied stress levels at the three states of the composite: glassy, glass transition, and rubbery regions. Weibull, Eyring, Burger, and Findley models are employed to predict the experimental data and to better elucidate the material behavior. Experimental creep tests are carried out under ten min and two days aiming at calibrating fitting parameters, which are essential to validate short-term creep tests. The Weibull and Eyring models are more suitable for determining the time-temperature superposition (TTS) creep response in comparison to the Burger and Findley models.



中文翻译:

碳/环氧树脂层压板在蠕变载荷下的时温行为

高级复合材料层压板的时间-温度蠕变行为在本文中是通过一组全面的实验和分析模型确定的。完整的结构通过在复合材料的三种状态(玻璃态,玻璃化转变和橡胶态)下的宽温度范围和施加的应力水平,可以确定特性关系。使用Weibull,Eyring,Burger和Findley模型来预测实验数据并更好地阐明材料行为。实验蠕变测试在十分钟零两天的时间内进行,目的是校准拟合参数,这对于验证短期蠕变测试至关重要。与Burger和Findley模型相比,Weibull和Eyring模型更适合于确定时间-温度叠加(TTS)蠕变响应。

更新日期:2020-09-08
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