Polymer composites as magnet materials: Irradiation effects and degradation mechanism of mechanical properties
Polymer composites as magnet materials: Irradiation effects and degradation mechanism of mechanical properties
复制标题
聚合物复合材料作为磁体材料：辐照效应和机械性能退化机制
DOI：
10.1016/0022-3115(91)90286-g
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发表时间：
1991
影响因子：
3.1
通讯作者：
T. Seguchi
中科院分区：
文献类型：
--
作者：
S. Egusa;T. Seguchi
室温下用60 Co γ射线或2 MeV电子辐照E玻璃纤维增强环氧和聚酰亚胺复合材料。然后在77 K和室温下对矩形试样进行三点弯曲试验，矩形试样的长度轴相对于增强织物的经纱和纬纱成0°或45°取向。无论复合材料类型和试验温度如何，0°试样以弯曲模式失效，而45°试样以剪切或剪切/弯曲混合模式失效。对于0°试样，极限弯曲强度的剂量依赖性不仅取决于试验温度，而且取决于复合材料中的基体树脂。复杂的剂量依赖性可以系统地解释的机制，复合材料的弯曲强度的退化几乎是由基体的极限应变的变化，由于辐照。而对于45 °试样，极限层间剪切强度的剂量依赖性仅与试验温度有关，与基体树脂无关。这一结果表明，复合材料剪切强度的退化是由纤维/基体界面处的辐射损伤而不是基体中的辐射损伤主导的。
E-glass fabric-reinforced epoxy and polyimide composites were irradiated with60Co γ-rays or 2 MeV electrons at room temperature. Three-point bend tests were then carried out at 77 K and at room temperature for rectangular specimens having their length axis in a 0° or 45° orientation with respect to the warp and fill of the reinforcing fabrics. Irrespective of the composite type and the test temperature, the 0° specimens fail in a flexural mode, while the 45° specimens fail in a shear or shear/flexural mixed mode. For the 0° specimens, the dose dependence of the ultimate flexural strength depends not only on the test temperature but also on the matrix resin in the composite. The complicated dose dependence can be explained systematically by the mechanism that the degradation of the composite flexural strength is virtually determined by a change in the matrix ultimate strain due to irradiation. For the 45 ° specimens, on the other hand, the dose dependence of the ultimate interlaminar shear strength is dependent only on the test temperature, and is independent of the matrix resin in the composite. This result suggests that the degradation of the composite shear strength is dominated by the radiation damage at the fiber/matrix interface rather than that in the matrix.