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Effect of Strain Rate on the Propagation of a Plastic Strain Pulse Along a Lead Bar

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2 Author(s)
Alter, B.E.K. ; Lehigh University, Bethlehem, Pennsylvania ; Curtis, C.W.

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Tests have been carried out to determine how pulses of plastic deformation disperse during propagation along a lead bar. Step function loading was employed in order to avoid complications resulting from the presence of relief stresses. By using a double pressure step technique, it was shown that the dispersion cannot be due solely to the nonlinearity of a time‐independent stress‐strain relation. On the other hand even a very simple model of a metal exhibiting a strain‐rate effect serves to predict qualitatively all of the main features of the experimental observations. It is therefore concluded that in the case of lead a strain‐rate effect plays an important part in controlling the behavior of a plastic strain pulse.

Published in:

Journal of Applied Physics  (Volume:27 ,  Issue: 9 )

Date of Publication:

Sep 1956

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