In the present study, filament wound pipes were fabricated by glass and polypropylene (PP) yarns with the three different filament winding angles 55°, 70°, and 82°. Glass and PP yarns were wound around the pipe with two methods; layered and hybrid. Epoxy resin was applied as a matrix to manufacture composite samples. It should be mentioned that composite samples were made in different layers. The three-point bending test was carried out on all samples to investigate the bending behavior of the composites. The experimental results showed that the winding angle 55° is better than other angles in terms of improving the flexural strength of the composite. Moreover, using hybrid yarn to fabricate the composite sample increases the flexural strength and energy absorption of the composite. In the next step, a multi-scale finite element model was applied to predict the flexural behavior of the composites. In this model, a unit-cell of each composite structure was modeled at the meso scale and elastic constants of the composites were extracted by a Python code. In addition, failure parameters for the composites were determined according to micromechanical equations. All elastic and failure parameters were utilized for the macro model and simulation three-point bending test. The numerical results were compared with the experimental and a good agreement could be observed between numerical and experimental results. So, the proposed model is proper to predict the mechanical behavior of the filament wound composite with high accuracy.

在本研究中，纤维缠绕管由玻璃和聚丙烯 (PP) 纱线制成，三种不同的纤维缠绕角度分别为 55°、70° 和 82°。玻璃丝和PP丝用两种方法缠绕在管子上；分层和混合。环氧树脂被用作基体来制造复合样品。应该提到的是，复合样品是在不同的层中制成的。对所有样品进行三点弯曲试验以研究复合材料的弯曲行为。实验结果表明，55°缠绕角度在提高复合材料的抗弯强度方面优于其他角度。此外，使用混合纱线制造复合材料样品增加了复合材料的弯曲强度和能量吸收。在下一步中，应用多尺度有限元模型来预测复合材料的弯曲行为。在该模型中，每个复合结构的晶胞在细观尺度上建模，复合材料的弹性常数通过 Python 代码提取。此外，复合材料的失效参数根据微观力学方程确定。所有弹性和破坏参数都用于宏观模型和模拟三点弯曲试验。将数值结果与实验进行了比较，可以观察到数值和实验结果之间的良好一致性。因此，所提出的模型适用于高精度预测纤维缠绕复合材料的力学行为。每个复合结构的晶胞在细观尺度上建模，复合材料的弹性常数通过 Python 代码提取。此外，复合材料的失效参数是根据微观力学方程确定的。所有弹性和破坏参数都用于宏观模型和模拟三点弯曲试验。将数值结果与实验进行了比较，可以观察到数值和实验结果之间的良好一致性。因此，所提出的模型适用于高精度预测纤维缠绕复合材料的力学行为。每个复合结构的晶胞在细观尺度上建模，复合材料的弹性常数通过 Python 代码提取。此外，复合材料的失效参数是根据微观力学方程确定的。所有弹性和破坏参数都用于宏观模型和模拟三点弯曲试验。将数值结果与实验进行了比较，可以观察到数值和实验结果之间的良好一致性。因此，所提出的模型适用于高精度预测纤维缠绕复合材料的力学行为。所有弹性和破坏参数都用于宏观模型和模拟三点弯曲试验。将数值结果与实验进行了比较，可以观察到数值和实验结果之间的良好一致性。因此，所提出的模型适用于高精度预测纤维缠绕复合材料的力学行为。所有弹性和破坏参数都用于宏观模型和模拟三点弯曲试验。将数值结果与实验进行了比较，可以观察到数值和实验结果之间的良好一致性。因此，所提出的模型适用于高精度预测纤维缠绕复合材料的力学行为。