Current study investigated the effect of thermal fatigue on mechanical and thermal properties of basalt fibre-reinforced polymer (BFRP) composites. To this, basalt fibre textiles in 2/2 twill pattern was used to fabricate BFRP composites. Thermal cycling experiment was carried out between $$-40$$ - 40 and $$+120^{\circ }$$ + 120 ∘ C for 20, 40, 60, 80 and 120 cycles. Moreover, dynamic mechanical analyzer (DMA) was used to evaluate the effect of thermal cycling on thermal properties of BFRPs. Moreover, we compared the extracted viscoelastic characteristics, such as storage modulus, loss modulus and loss factor curves with original thermal-treated BFRP specimens. Based on the results, thermal cycling affected the characteristics of composites in the post-curing stage due to an increase in temperature. Finally, the effect of thermal cycling on water absorption properties of BFRP composites was examined by hydrophobicity test. The results showed that tensile strength, flexural modulus and ILSS values increased with the increase in the number of cycles up to 80 cycles. In other words, an increase in the number of cycles increased the hydrophobicity of BFRP composites by decreasing the contact angles. Finally, the mechanical properties of tested composites were significantly decreased when the number of cycles reached 120. This was due to the mismatch of thermal expansion coefficient and long crack formation in the structure of composite.

中文翻译：

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热循环对玄武岩纤维增强环氧树脂复合材料力学和热性能的影响

目前的研究调查了热疲劳对玄武岩纤维增强聚合物 (BFRP) 复合材料的机械和热性能的影响。为此，使用 2/2 斜纹图案的玄武岩纤维纺织品制造 BFRP 复合材料。热循环实验在 $$-40$$ - 40 和 $$+120^{\circ }$$ + 120 ∘ C 之间进行 20、40、60、80 和 120 个循环。此外，动态力学分析仪 (DMA) 用于评估热循环对 BFRP 热性能的影响。此外，我们将提取的粘弹性特征，如储能模量、损耗模量和损耗因子曲线与原始热处理 BFRP 试样进行了比较。根据结果​​，由于温度升高，热循环影响了后固化阶段复合材料的特性。最后，通过疏水性试验考察了热循环对BFRP复合材料吸水性能的影响。结果表明，拉伸强度、弯曲模量和 ILSS 值随着循环次数的增加而增加，直至 80 次循环。换句话说，循环次数的增加通过降低接触角来增加 BFRP 复合材料的疏水性。最后，当循环次数达到120次时，测试复合材料的力学性能显着下降。这是由于热膨胀系数不匹配和复合材料结构中长裂纹的形成。换句话说，循环次数的增加通过降低接触角来增加 BFRP 复合材料的疏水性。最后，当循环次数达到120次时，测试复合材料的力学性能显着下降。这是由于热膨胀系数不匹配和复合材料结构中长裂纹的形成。换句话说，循环次数的增加通过降低接触角来增加 BFRP 复合材料的疏水性。最后，当循环次数达到120次时，测试复合材料的力学性能显着下降。这是由于热膨胀系数不匹配和复合材料结构中长裂纹的形成。