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本文讨论了模拟空间辐射环境对用弹性体增韧环氧石墨复合材料尺寸稳定性的影响。描述了该材料受辐照后(剂量相当于在地球同步轨道上6个月到30年受到的辐照剂量)的响应特性。其结果显示,辐照与环氧基体的相互作用使得复合材料在相当低的总剂量(10~7rads)下即发生脆化。在热交变期间,材料脆化导致热膨胀性能的变化并产生大量的层合板微裂纹。这些性能的变化,限制了这些材料在某些空间飞行器上的使用寿命。
This article discusses the effect of simulated space radiation environment on the dimensional stability of toughened epoxy graphite composites with elastomers. Describes the response of this material to radiation (dose equivalent to the radiation dose received on geo-orbit between 6 months and 30 years). The results show that the interaction of radiation with the epoxy matrix causes the composites to embrittle at relatively low total doses (10 to 7 rads). During heat exchange, material embrittlement leads to changes in thermal expansion properties and to a large amount of laminate microcracks. These changes in performance limit the useful life of these materials on some spacecraft.