Katouzian Mostafa, Vlase Sorin, Scutaru Maria Luminita
Department Machine Tools, Technical University of Munich, 85748 Munich, Germany.
Department of Mechanical Engineering, Transilvania University of Brașov, B-dul Eroilor 20, 500036 Brașov, Romania.
Polymers (Basel). 2021 Mar 25;13(7):1017. doi: 10.3390/polym13071017.
Usually, a polymer composite with a viscoelastic response matrix has a creep behavior. To predict this phenomenon, a good knowledge of the properties and mechanical constants of the material becomes important. Schapery's equation represents a basic relation to study the nonlinear viscoelastic creep behavior of composite reinforced with carbon fiber (matrix made by polyethrtethrtketone (PEEK) and epoxy resin). The finite element method (FEM) is a classic, well known and powerful tool to determine the overall engineering constants. The method is applied to a fiber one-directional composite for two different applications: carbon fibers T800 reinforcing an epoxy matrix Fibredux 6376C and carbon fibers of the type IM6 reinforcing a thermoplastic material APC2. More cases have been considered. The experimental results provide a validation of the proposed method and a good agreement between theoretical and experimental results.
通常，具有粘弹性响应基体的聚合物复合材料具有蠕变行为。为了预测这一现象，深入了解材料的性能和力学常数变得至关重要。沙佩里方程代表了研究碳纤维增强复合材料（由聚醚醚酮（PEEK）和环氧树脂制成的基体）非线性粘弹性蠕变行为的基本关系。有限元法（FEM）是确定整体工程常数的经典、知名且强大的工具。该方法应用于两种不同用途的纤维单向复合材料：T800碳纤维增强环氧树脂基体Fibredux 6376C以及IM6型碳纤维增强热塑性材料APC2。还考虑了更多情况。实验结果验证了所提出的方法，并且理论结果与实验结果吻合良好。
