摘要
以真空渗流法制备陶瓷中空球泡沫铝,研究了应变率对吸能量和吸能效率的影响、相对密度对屈服强度的影响,并与普通泡沫铝进行比较。结果表明,工艺简单可行,所制备的泡沫铝的动态压缩应力-应变曲线只有弹性变形区和塑性变形区;随应变率的增大,屈服强度和吸能效率变化规律不明显,吸能量增大;随相对密度的增大,屈服强度增大,吸能量增大,吸能效率也增大;动态压缩时两种泡沫铝的吸能效率均较高,最大吸能效率大于0.9,是良好的吸能材料。
The foam aluminum with hollow ceramic sphere was prepared by the vacuum infiltration. Effects of strain rate on the efficiency of energy absorption and the relative density on the yield strength were studied. The results were also compared with those of the normal foam aluminum. The experimental results reveal that the dynamitic compressive stress-strain curve only has elastic deformation and plastic deformation. The absorption energy increases with the increase of the strain rate, while the variation of the yielding strengths and the energy absorption efficiency is not obvious. With the increase of the relative density, the compressive yielding strengths, the energy absorption capacity and the energy absorption efficiency increase dramatically. The energy absorption efficiency of two kinds of foam aluminum at the dynamic compression is higher and the maximum value is above 0.9, so it is a kind of good energy absorption materials.
出处
《铸造技术》
EI
CAS
北大核心
2006年第3期239-242,共4页
Foundry Technology
关键词
泡沫铝
中空球
真空渗流
动态力学性能
Alumint
foam
Vacuum infiltration
Dynamic property
Dynamic mechanical properties
