Dynamic compressive stress-strain curves at various strain rates of an Ethylene-Propylene-Diene Monomer Copolymer (EPDM) rubber have been determined with a modified split Hopkinson pressure bar (SHPB). The use of a pulse-shaping technique ensures that the specimen deforms at a nearly constant strain rate under dynamically equilibrated stress. The validity of the experiments was monitored by a high-speed digital camera for specimen edge deformation, and by piezoelectric force transducers for dynamic stress equilibrium. The resulting dynamic stress-strain curves for the EPDM indicate that the material is sensitive to strain rates and that the strain-rate sensitivity depends on the value of strain. Based on a strain energy function theory, a one-dimensional dynamic constitutive equation for this rubber was modified to describe the high strain-rate experimental results within the ranges of strain and strain rates presented in this paper.
One-Dimensional Dynamic Compressive Behavior of EPDM Rubber
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division January 7, 2002, revision received February 27, 2003. Associate Editor: M. Zhou.
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Song, B., and Chen, W. (July 10, 2003). "One-Dimensional Dynamic Compressive Behavior of EPDM Rubber ." ASME. J. Eng. Mater. Technol. July 2003; 125(3): 294–301. https://doi.org/10.1115/1.1584492
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