Effect of structure characteristic parameters and strain rate on the compressive mechanical properties of aluminum foams Article

cited authors

  • Wang, YG; Wang, CL

fiu authors

abstract

  • A series of uniaxial compression experiments of open-and close-cell aluminum foams were conducted by using a MTS hydraulic pressure machine and a split Hopkinson pressure bar (SHPB) at different strain rates. Results show that the quasi-static compressive behaviors of aluminum foams depend on the aspect ratio of the sample. With the decrease in the aspect ratio of the sample, the plastic yield stress becomes higher and the plastic yield plateau becomes smaller in length, which is attributed to the influence of the friction force between the end face of sample and the loading plateau. The density of aluminum foams has a significant influence on the quasi-static compressive behavior and results in the appearance of the smooth plastic plateau phase. With the increase in the density, the deformation mechanism is changed from the localized plastic collapse to the whole plastic yield. The plateau stress of aluminum foams shows an apparent strain rate dependence.

publication date

  • January 1, 2011

start page

  • 106

end page

  • 111

volume

  • 32

issue

  • 1