Effects of Strain Rate and Relative Density on Compressive Properties of SiCp/ZL104 Composite Foams

Abstract:

The quasi-static and dynamic compressive properties of 5vol%SiCp/ZL104 composite foams, fabricated by the method of direct melt foaming, were tested and analyzed. The results show that under the conditions of quasi-static or dynamic compression, the stress-strain curves of 5vol%SiCp/ZL104 composite foams involves three regions: the linear elastic deformation region, the collapse plateau region and the densification region. The yield stress is sensitive to the strain rate, so it increases and the strain hardening occurs with the increase of the strain rate. Compared with that under quasi-static loading, dynamic yield stress and flow stress of 5vol%SiCp/ZL104 composite foams increase remarkably with the increase of relative density.

Key words:SiCp/ZL104 composite foams; strain rate; relative density