The Inclusion of Strain-Rate Dependence in the PUFF Computer Code
Technical rept. Sep 1968-Jan 1969
AIR FORCE WEAPONS LAB KIRTLAND AFB NM
Pagination or Media Count:
Two mathematical descriptions of the strain-rate dependence of materials response to suddenly applied one-dimensional strain loads were incorporated into the PUFF wave propagation computer codes. The models are quite different in that one uses a macroscopic relaxation time to govern the stress- relaxation rates, while the other uses the microscopic theories of dislocation dynamics. The results of several sample calculations are discussed, and the changes required in the programming sequence are given. Some comments are provided concerning the validity and usefulness of these models, and a brief analysis of the effects of parametric variations is presented.