Abstract
The dynamic compressive properties of starch-based biodegradable plastics were measured over a wide range of strain rates from 10^<-4> to 10^<-3> s^<-1> by using a split Hopkinson pressure bar method. In addition, compressive and tensile static stress-strain curves of starch-based biodegradable plastics were measured at a strain rate of 10^<-3> s^<-1>. We determined constants of Drucker-Prager yield criterion for starch-based biodegradable plastics, and drew the yield curves in the second deviatoric stress and invariant-first invariant of stress. The compressive yield stress is dependent upon the strain rate.
