Srebrenkoska Sara, Kochoski Filip, Srebrenkoska Vineta, Risteska Svetlana, Kotynia Renata
Faculty of Mechanical Engineering, Goce Delcev University, Krste Misirkov 10-A, P.O. Box 201, 2000 Stip, North Macedonia.
Faculty of Technology, Goce Delcev University, Krste Misirkov 10-A, P.O. Box 201, 2000 Stip, North Macedonia.
Polymers (Basel). 2023 Jun 27;15(13):2829. doi: 10.3390/polym15132829.
The aim of this study was to investigate the mechanical and thermal properties of composite pipes based on epoxy resin and glass fibers produced by filament winding (FW) technology. Epoxy resins are widely used polymers in FW composite structures. The thermal characterization of the neat epoxy resin, curing, and post-curing characteristics for the determination of polymerization and glass transition temperature was performed, which is important for the mechanical properties of polymer composite pipes. In the present work, the applicability of the full factorial experimental design in predicting the hoop tensile and compressive strengths of glass fiber/epoxy resin composite pipes was investigated. The composite pipes in accordance with the 2 full factorial experimental design by using of three parameters and two levels of variation were prepared. The winding speed of the composites was taken to be the first factor, the second was the fiber tension, and the third was winding angle. To approximate the response, i.e., the mechanical properties of the composite pipes within the study domain, the first-order linear model with the interaction was used. The influence of each individual factor to the response function was established, as well as the influence of the interaction of the two and three factors. Additionally, those results were completed with the thermal characterization of the polymer composite pipes. From received results from mechanical and thermal characterization, it was concluded that the properties of composite specimens were highly affected by the analyzed parameters in filament winding technology. It was found that the estimated first-degree regression equation with the interaction gave a very good approximation of the experimental results of the hoop tensile and the compressive strengths of composite pipes within the study domain.
本研究的目的是研究基于环氧树脂和玻璃纤维、采用纤维缠绕（FW）技术生产的复合管的力学和热性能。环氧树脂是纤维缠绕复合结构中广泛使用的聚合物。对纯环氧树脂进行了热表征、固化以及用于确定聚合和玻璃化转变温度的后固化特性研究，这对聚合物复合管的力学性能很重要。在本工作中，研究了全因子实验设计在预测玻璃纤维/环氧树脂复合管环向拉伸和压缩强度方面的适用性。按照2全因子实验设计，利用三个参数和两个变化水平制备了复合管。复合材料的缠绕速度作为第一个因素，第二个是纤维张力，第三个是缠绕角度。为了近似响应，即研究范围内复合管的力学性能，使用了带有交互作用的一阶线性模型。确定了每个单独因素对响应函数的影响，以及两个和三个因素交互作用的影响。此外，这些结果还通过聚合物复合管的热表征得以完善。从力学和热表征得到的结果得出结论，纤维缠绕技术中的分析参数对复合试件的性能有很大影响。发现带有交互作用的估计一阶回归方程对研究范围内复合管环向拉伸和压缩强度的实验结果给出了很好的近似。
