THE DYNAMIC ELASTIC-PLASTIC INTERFACE AND RELATED TOPICS.
KENTUCKY UNIV LEXINGTON DEPT OF ENGINEERING MECHANICS
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Experimental data for the response in a bar when a plastic deformation wave impinges upon a junction with an elastic material are presented. This is accomplished by using a composite aluminum specimen made by gluing a short annealed soft section to a long hard elastic one. The short section is ten inches long and therefore strain histories at several points are easily observed by means of wire resistance strain gauges. It is found that there are reflections from the elastic-plastic interface which are in qualitative agreement with the predictions of the strain-rate independent theory. However, the experimental data do differ from this theory in quantitative ways. This discrepancy is due in part to interactions with the material in the response range where it is strain-rate dependent. Author