| Issue |
EPJ Web of Conferences
Volume 26, 2012
DYMAT 2012 - 10th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
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|---|---|---|
| Article Number | 01061 | |
| Number of page(s) | 6 | |
| Section | Experimental Techniques | |
| DOI | https://doi.org/10.1051/epjconf/20122601061 | |
| Published online | 31 August 2012 | |
https://doi.org/10.1051/epjconf/20122601061
High strain-rate compressive behavior and constitutive modeling of selected polymers
Department of Mechanical Engineering, Okayama University of Science, Okayama 700-0005, Japan
The present paper deals with constitutive modeling of the compressive stress-strain behavior of selected polymers at strain rates from 10−3 to 103/s using a modified Ramberg-Osgood equation. High strain-rate compressive stress-strain curves for four different commercially available extruded polymers are determined on the standard split Hopkinson pressure bar. The low and intermediate strain-rates compressive stress-strain relations are measured in an Instron testing machine. The five parameters for the modified Ramberg-Osgood equation are determined by fitting to the experimental compressive stress-strain data using a least-squares fit. The compressive stress-strain curves at three different strain rates derived from the modified Ramberg-Osgood models are compared with the experimental results. It is shown that the compressive stress-strain behavior during loading process can be successfully predicted by the modified Ramberg-Osgood equation.
© Owned by the authors, published by EDP Sciences, 2012