PLANE COLLISIONS OF MURNAGHAN PLASTICS
Abstract
The one-dimensional problem of a flat plate (infinite in the plane normal to its direction of motion) colliding with a target of like material is treated hydrodynamically, and follows closely the treatment of Fowles. The theory of characteristics is developed in detail. The results of desk calculations for collisions of aluminum, Lucite, and polyethylene for plates 1 mm in thickness and initial speeds of 1 mm/microsec are presented graph ally. Inhan equation of state is used for these materials; changes across the shock front are assumed isentropic. The results of a second calculation for the cases of Lucite and polyethylene plates, 1 mm in thickness and with initial kinetic energies equal to that of the aluminum plate in the first calculation, are also presented in a series of graphs for each collision. Further, equations are developed for calculation of the dissipation of total kinetic energy of the plaeach case an empirical Murnaghan equation of state is used for these materials; changes across the shock front are assumed isentropic. The results of a second calculation for the cases of Lucite and polyethylene plates, 1 mm in thickness and with initial kinetic energies equal to that of the aluminum plate in the first calculation, are also presented in a series of graphs for each collision. Further, equations are developed for calculation of the dissipation of total kinetic energy of the platetarget system with time, and results for a few representative times for each collision are compared. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1961
- Accession Number
- AD0264658
Entities
People
- P.j. Blewett
Organizations
- Air Force Special Weapons Center