Advanced fiber-reinforced polymer composites are stronger, durable and lighter than their metallic counterparts. Inter-ply hybrid polymer composites are formed by more than one type of fiber plies reinforced in the same matrix. The durability and integrity of the altered stacking sequence and hybrid ratio of such composites at low temperature conditions have not been widely explored. In this research work, flexural behavior of cryogenic conditioned glass and/or carbon fibers-based hybrid composites has been studied. Substituting two glass fiber plies with those of carbon on the top side of glass/epoxy (GE) composite, denoted as (C₂G₃), achieved the maximum flexural strength of 491.94 MPa (27.82% higher than unconditioned neat GE composite) after 8 h of conditioning, and the highest flexural modulus of 33.52 GPa was attained by C₁G₃C₁ composite. A detailed analysis of the effect of conditioning duration and stacking sequence of the hybrids on the flexural properties was done and the underlying mechanisms were discussed. Post-failure analysis of composites using a scanning electron microscope was done to understand the fractographic behavior of the samples. Finally, elemental analysis was used to measure nitrogen incorporation within the matrix as a function of conditioning duration.

先进的纤维增强聚合物复合材料比金属复合材料更坚固、耐用且重量更轻。层间混合聚合物复合材料由在同一基体中增强的不止一种类型的纤维层形成。这种复合材料在低温条件下改变的堆叠顺序和混合比的耐久性和完整性尚未得到广泛探索。在这项研究工作中，研究了低温调节玻璃和/或碳纤维基混合复合材料的弯曲行为。在玻璃/环氧树脂 (GE) 复合材料的顶侧用碳纤维层代替两层玻璃纤维层，表示为 (C ₂ G ₃)，在调节 8 小时后达到了 491.94 MPa 的最大弯曲强度（比未处理的纯 GE 复合材料高 27.82%），并且 C ₁ G ₃ C ₁复合材料获得了 33.52 GPa 的最高弯曲模量。详细分析了混合材料的调节持续时间和堆叠顺序对弯曲性能的影响，并讨论了潜在的机制。使用扫描电子显微镜对复合材料进行失效后分析，以了解样品的断口行为。最后，元素分析用于测量基质内的氮结合作为调节持续时间的函数。