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摘要: 制备了空心玻璃微珠(HGM)/环氧树脂复合泡沫材料、泡沫铝-HGM/环氧树脂两类环氧树脂基复合材料, 测量了其在北方室内环境中自然老化前后的密度。通过一系列准静态压缩实验研究了HGM/环氧树脂和泡沫铝-HGM/环氧树脂两类复合材料的有效弹性模量、屈服极限等力学性能, 分析了其破坏形貌与材料结构的关系及力学性能改变的原因。研究表明: 环氧树脂老化后屈服极限有所降低, 但HGM/环氧树脂复合泡沫材料的力学性能随着HGM填充量的增加呈先增加后降低的趋势。泡沫铝/环氧树脂复合材料老化后的力学性能出现明显降低, 但添加HGM体积比高于20%的泡沫铝-HGM/环氧树脂复合材料的力学性能则有所增加。Abstract: The HGM/epoxy composites reinforced with modified hollow glass microbeads(HGM), and with foam aluminum are prepared. Their densities of the HGM/epoxy and foal aluminum-HGM/epoxy composites before and after natural aging indoor are studied. And their yield limits and effective elastic modulus are investigated by a series of quasi static compressive experiments. The relationship between damage morphologies and material structure is discussed. The change reasons of mechanical properties of them are analyzed. It is found that the yield limit of epoxy is a little decrease after natural aging. But the mechanical properties of syntactic foams are increase after natural aging. And the increase percentage increases firstly and then decreases with the increase of HGM volume ratio. The mechanical properties of foam aluminum/epoxy have a large decrease after aging. But the mechanical properties of foam aluminum-HGM/epoxy which HGM volume ratio greater than 20% are increased.
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Keywords:
- epoxy /
- syntactic foam /
- foam Al /
- natural aging /
- mechanical properties
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