ホプキンソン棒を用いた生分解性でんぷんプラスティックスの動的圧縮特性の評価

概要

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The dynamic compressive properties of starch-based biodegradable plastics were measured using a split Hopkinson pressure bar (SHPB) method. The relationship between the stress and the particle velocity for starch-based biodegradable plastics is determined by the impedance match method by means of a SHPB over the particle velocity range of up to 13.0m/s. In addition, dynamic stress-strain curves of starch-based biodegradable plastics were measured over a wide range of strain rates from 10^<-5>s^<-1> to 10^4s^<-1>, using a quasi-static compression testing machine and a SHPB method. Young's modulus and flow stress are dependent upon the strain rate. Empirical equations for 7% flow stress are derived for the strain rates from 10^<-5>s^<-1> to 10^0s^<-1> and from 10^3s^<-1> to 10^4s^<-1>. It is also found that the attenuation of stress waves is quite large and is also dependent upon the strain rate.
一般社団法人日本機械学会の論文
2005-05-25