Dynamic anisotropic responses of two amorphous polymers have been determined under high strain-rate uniaxial tension and compression conditions. A split Hopkinson tension bar was modified to determine the dynamic tensile stress-strain behavior from the lowstrength and low-mechanical-impedance specimens. An aluminum split Hopkinson pressure bar was used to determine the dynamic compressive responses. Pulse shaping was applied to ensure homogeneous deformation in the low-impedance specimens. Compared to quasi-static behavior, dynamic tension causes stiffer stress-strain behavior during loading, whereas dynamic compression results in significantly higher compressive strengths.
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