Dynamic and Quasi-Static Compression Tests for Polylactic Acid Resin Foam

Abstract:

In this study, the effect of strain rate on the strength and the absorbed energy of polylactic acid resin foam (PLA-foam), which is generally known as one of carbon-neutral and environmentally-friendly polymers, were examined by a series of compression tests at various strain rates from 0.001 to 750 s^-1. For the measurements of the impact load and the displacement of specimen, a special load cell and a high-speed video camera were used, respectively. The flow stress of the PLA-foam strongly depends upon not only strain rate but also density of specimens. Thus, a new technique to eliminate the effect of the difference in the specimen density was proposed and successfully applied. It was also found that the strain-rate dependency of PLA-foam can be expressed by a simple power law.

• Periodical: Materials Science Forum (Volumes 706-709)
• Pages: 745-750
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.706-709.745
• Online since: January 2012
• Authors: Hidetoshi Kobayashi, Keitaro Horikawa, Keiko Watanabe, Kinya Ogawa, Kensuke Nozaki
• Keywords: Carbon Neutral, Constitutive Equation, Density Compensation, Energy Absorption, Impact Deformation, Strain Rate Dependency

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