An Investigation of the Behavior of Materials Under High Rates of Deformation

摘要

Techniques are developed for determining the strength properties of metals in tension and compression over a range in strain rate from approximately 0.001/sec to 1000/sec and for temperatures from 70 F to 750 F. The validity of the dynamic test techniques are discussed in some detail. Results are obtained for six different metals of technical interest. The results are presented in the form of plots of stress vs. strain, strain rate, or temperature in order to indicate the relations between these four independent variables. Percent elongation to failure as a function of strain rate and temperature is presented for the tensile specimens. A brief discussion of the results in the light of currently proposed models for dislocation mobilities is included. (Author)