Toughened graphite-epoxy composites exposed in near-Earth orbit for 5.8 years
Toughened graphite-epoxy composites exposed in near-Earth orbit for 5.8 years
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DOI：
10.2514/3.26612
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发表时间：
1995-03
影响因子：
1.6
通讯作者：
D. K. Felbeck
中科院分区：
文献类型：
--
作者：
D. K. Felbeck
本实验旨在测量近地空间暴露对特殊增韧单向 T300/5208 石墨-环氧交叉层复合材料的三种机械性能的影响。测量的性能是断裂韧性、弹性模量和强度。在长时间暴露设施的 5.8 y 轨道上，将六个韧性样本和九个拉伸样本安装在外部框架上。一开始就制造了三组相同的样本：飞行组、零时间非飞行组和总时间非飞行组。结果表明，通过适当防止阳光照射和原子氧降解，增韧石墨-环氧树脂复合材料可以在近地轨道上提供有用的结构服务至少五年。
This experiment was designed to measure the effect of near-Earth space exposure on three mechanical properties of specially toughened unidirectional T300/5208 graphite-epoxy cross-ply composite materials. The properties measured are fracture toughness, elastic modulus, and strength. Six toughness specimens and nine tensile specimens were mounted on an external frame during the 5.8-y orbit of the Long Duration Exposure Facility. Three identical sets of specimens were manufactured at the outset: the flight set, a zero-time nonflight set, and a total-time nonflight set. Results indicate that with proper protection from solar exposure and atomic-oxygen degradation, toughened graphite-epoxy composites can provide useful structural service in near-Earth orbit for at least five years.