Accession Number:

ADA031643

Title:

Kinetics of Shock-Induced Phase Transitions.

Descriptive Note:

Final rept.,

Corporate Author:

WASHINGTON STATE UNIV PULLMAN SHOCK DYNAMICS LAB

Personal Author(s):

Report Date:

1976-06-01

Pagination or Media Count:

236.0

Abstract:

A method is developed for performing and interpreting shock wave experiments in two-dimensional strain using a light gas gun. The experimental configuration consists of the impact of a projectile on a wedge whose impact face makes an angle alpha with the projectile impact face. The instrumentation consists of resistance wires stretched parallel to and offset from the wedge rear surface in order to detect free surface motion. The system has the capability of making measurements over a continuous range of shock propagation distances in a single experiment. The repeatability of the technique is good to within three to four percent. The analytical technique consists of a Lagrangian finite-difference code written specifically to handle wedge impact problems. It includes material strength, stress relaxation, and phase transitions. Experiments were done on aluminum wedges and on iron and KC1 wedges shocked past their transition points. Comparisons with computer calculations of the problems show excellent agreement.

Subject Categories:

  • Computer Programming and Software
  • Test Facilities, Equipment and Methods
  • Fluid Mechanics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE