The utilization of hollow glass particle‐filled fiber‐reinforced composites in marine applications necessitates a proper understanding of their behavior when exposed to moisture environments. In this study, the glass fiber‐reinforced composites reinforced with 0%–30% volume fraction of glass microspheres were fabricated and immersed in seawater and distilled water conditions for monotonic tensile and flexural testing. The degradation mechanisms were analyzed by dynamic mechanical analysis (DMA), Fourier transform infrared spectroscopy (FT‐IR), and scanning electron microscopy (SEM). Moisture absorption results showed an increasing trend with the inclusion of glass microspheres. A decline in glass transition temperature and storage modulus was observed as a result of moisture absorption. The tensile results of the specimens exhibited a decrease of 13% and 9% in distilled water and seawater solution, respectively when compared with unaged samples, respectively. The flexural results of the aged composite specimens demonstrated a reduction of 24% and 11% in distilled water and seawater solution, respectively when compared with unaged samples. The findings also show that the influence of moisture on the modulus is less pronounced compared to its effect on strength under both environmental conditions. The micrograph results revealed a notable deterioration of the glass microsphere and the fiber/matrix interface in the moist environment.Highlights Water absorption increases with the addition of glass microspheres. Microsphere degradation and fiber/matrix debonding are the governing mechanism. Retained 89% of tensile strength of their initial properties after exposed in sea water. Increase in microsphere contents decreases the tensile and flexural strength.

中文翻译：

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玻璃纤维增​​强空心玻璃颗粒填充环氧复合材料在潮湿环境下的力学行为

在海洋应用中使用空心玻璃颗粒填充纤维增强复合材料需要正确了解它们暴露在潮湿环境中时的行为。在这项研究中，制备了体积分数为0%~30%的玻璃微球增强的玻璃纤维增​​强复合材料，并将其浸入海水和蒸馏水条件下进行单调拉伸和弯曲测试。通过动态机械分析（DMA）、傅里叶变换红外光谱（FT-IR）和扫描电子显微镜（SEM）分析了降解机制。随着玻璃微球的加入，吸湿率结果呈现出增加的趋势。由于吸湿，观察到玻璃化转变温度和储能模量下降。与未老化的样品相比，样品在蒸馏水和海水溶液中的拉伸结果分别降低了 13% 和 9%。与未老化的样品相比，老化的复合材料样品在蒸馏水和海水溶液中的弯曲结果分别减少了 24% 和 11%。研究结果还表明，在两种环境条件下，与湿度对强度的影响相比，湿度对模量的影响不太明显。显微照片结果显示，在潮湿环境中，玻璃微球和纤维/基体界面显着恶化。 吸水率随着玻璃微球的添加而增加。 微球降解和纤维/基体脱粘是控制机制。 暴露在海水中后仍保留其初始性能的 89% 的拉伸强度。 微球含量的增加降低了拉伸强度和弯曲强度。