Size Effects Investigation on Mechanical Properties of Closed-cell Aluminum Foam

The quasi-static uniaxial compression experiments were performed on closed-cell aluminum foam with different size,and the nominal stress-strain curves of testing samples were obtained accordingly.It can be found that the mechanical properties of closed-cell aluminum foams have obvious size effects.Maintaining the thickness of the samples,the nominal yield stress increases with the section areas increasing.Keeping in the same section area,the nominal yield stress reduces with increasing sample thickness,then becomes stable.The mechanism of the size effects is also briefly presented.