Dynamic plasticity: Macroscopic and microscopic aspects

Abstract A brief account is given of theoretical treatments of plastic deformation based on considering the material as a continuum or as a crystalline solid in which flow occurs by the motion of dislocations. Theoretical and experimental work on stress-wave propagation in rate-independent and rate-dependent materials is then discussed. The available experimental methods for the study of strain-rate effects are described, and results are given for a variety of metals and alloys tested at strain rates covering some eight orders of magnitude. These results are discussed in terms of some of the more important rate-controlling mechanisms. Finally, attention is drawn to several important practical problems in which rate-dependent mechanical behaviour is significant, and suggestions are made concerning areas in which further studies are desirable.

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