论文部分内容阅读
泡沫铝-复合泡沫互穿相复合材料是一种新型的结构功能一体化材料,在机械、交通、建筑等领域具有重要的应用前景。本文制备了纯泡沫铝及空心玻璃微珠四种体积分数的泡沫铝-复合泡沫试件,通过摆锤冲击实验研究了其冲击韧度,讨论了其断口形貌与结构性能的关系,通过单轴压缩的应力松弛实验研究其黏弹性性能。研究表明:空心玻璃微珠体积分数为10%的泡沫铝-复合泡沫试件的冲击韧度最大,随后其冲击韧度随空心玻璃微珠体积分数的增加而减小;当空心玻璃微珠体积分数较小时,泡沫铝的结构形貌决定了冲击断口的形貌,但当其体积分数达到30%时,空心玻璃微珠的破坏是形成断口形貌的主要原因;复合材料的黏弹性性能随着玻璃微珠体积分数的增加而增大。
Foamed aluminum - composite foam interpenetrating composites is a new type of structural and functional integrated materials, which has important application prospects in the fields of machinery, transportation and construction. In this paper, four types of foam aluminum-composite foam samples with pure aluminum foam and hollow glass beads were prepared. The impact toughness was studied by pendulum impact test. The relationship between the fracture morphology and the structural properties was discussed. Axis compression stress relaxation experiment was conducted to study its viscoelastic properties. The results show that the impact toughness of the foamed aluminum-composite foam with 10% hollow glass microbeads volume fraction is the largest, then the impact toughness decreases with the increase of hollow glass microbead volume fraction. When the volume of hollow glass microbeads When the fraction is small, the morphology of the foam aluminum determines the morphology of the impact fracture. However, when the volume fraction reaches 30%, the destruction of the hollow glass beads is the main reason for the fracture appearance. The viscoelastic properties of the composite Glass beads increased the volume fraction increases.