The effects of γ‐radiation on properties of three types of commercial alkaline earth aluminosilicate glasses (NJE, NJ1, NJ2) were investigated at 5M Gy dosage, using samples of bulk glass, glass fiber, and fiber reinforced laminate epoxy composite. The radiation‐induced defect generation and structural modifications in the bulk glasses were characterized by UV‐VIS‐NIR, FTIR absorption spectroscopy, respectively. Strong radiation resistance was found in NJ2 composed of high content of glass former such as Si and Al, together with variable Fe and Ce oxide. Mechanical properties of the fiber woven fabric taps and reinforced laminate composites were investigated before and after the irradiation. While the tap samples showed minor property degradations after the irradiation, all composite samples degraded by greater than 19% in tensile strength and greater than 55% in interlaminate shear strength (ILSS) at 5M Gy dose level. Deterioration of the composite mechanical properties is primarily attributed to the radiation damage to the epoxy resin and in turn, the failure mode of the irradiated composite samples is dominated by delamination at the interfaces between the fiber glass tapes and the resin under the applied tensile load or shear as compared with the failure mode of fiber breakages for their counterparts without γ‐irradiation.

中文翻译：

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玻璃抗辐射性－第一部分：三种商用玻璃纤维的初步研究

使用块状玻璃，玻璃纤维和纤维增强层压环氧复合材料的样品，研究了在5M Gy剂量下γ辐射对三种类型的碱土金属铝硅酸盐玻璃（NJE，NJ1，NJ2）性能的影响。分别通过UV-VIS-NIR，FTIR吸收光谱对大玻璃中的辐射诱发缺陷产生和结构改性进行了表征。在由高含量的玻璃成型剂（如Si和Al）以及可变的Fe和Ce氧化物组成的NJ2中发现了较强的抗辐射性。在辐照之前和之后研究纤维机织物丝锥和增强层压复合材料的机械性能。尽管抽头样品在辐照后显示出轻微的性能下降，在5M Gy剂量水平下，所有复合材料样品的拉伸强度均下降19％以上，层间剪切强度（ILSS）下降55％以上。复合材料机械性能的下降主要归因于环氧树脂的辐射损伤，进而，在施加的拉伸载荷下，玻璃纤维带与树脂之间的界面处发生分层，从而辐照了复合材料样品的失效模式。与没有γ辐照的纤维断裂的破坏模式相比，它具有更大的剪切力。