Abstract
The compressive properties of foamed polyethylene (PE) film with a closed cell for electronic devices have been investigated. A commercial closed cell foamed PE film was used. This foamed PE film has characteristics of thin (100μm) and closed-cell structure. In the present study, the effect of strain rate on compressive properties of the foamed PE film was experimentally investigated. Quasi-static testing was carried out at strain rates of 10^<-3> to 10^<-1> s^<-1>. The strain rate of the impact test was approximately 10^3 s^<-1> using split Hopkinson pressure bar method. Within the set of experiments, the compressive stress increased with the strain rate. In particular, the flow stress increased substantially with the increasing strain rate in the impact deformation. The plateau deformation was observed immediately after the compressive testing started, with no linear-elastic response phase. The densification strain was decreased with increasing the strain rate.
