Zobrazeno 1 - 10
of 38
pro vyhledávání: '"G. R. Fowles"'
Publikováno v:
Journal of Geophysical Research. 79:332-338
This work reports on phase transition kinetics and wave propagation in Arkansas novaculite, a fine-grained polycrystalline α quartz rock, when it is subject to high-pressure dynamic loading and relief. The stress region studied is between 150 and 40
Publikováno v:
Journal of Applied Physics. 46:532-546
A study of shock wave propagation along the 〈100〉 direction in LiF single crystals is presented. Plate impact experiments were conducted to produce elastic impact stresses of approximately 29 kbar. Stress time profiles at the impact surface and r
Publikováno v:
Journal of Applied Physics. 46:3752-3759
An experimental impact technique is described for exposing materials to small amplitude stresses in states of uniaxial strain for small times. It is applied to single crystals of LiF containing ∼8 ppm Mg, and multiplication of screw dislocations is
Autor:
G. R. Fowles
Publikováno v:
Journal of Applied Physics. 31:655-661
The attenuation of the plane shock wave produced in a solid by a flying plate of the same material is treated neglecting dissipative processes and effects of material rigidity. Explicit formulas for the position of the shock front and the shape of th
Autor:
G. R. Fowles
Publikováno v:
Journal of Applied Physics. 32:1475-1487
Measurements of the Hugoniot equations of state of hardened and annealed 2024 aluminum at pressures below 50 kbar are presented. The major aim of the experiments was to determine the validity of elastic‐plastic theory, which predicts that, at a giv
Publikováno v:
Journal of Applied Physics. 43:2132-2145
Experimental data for shock propagation along a 〈100〉 direction in single‐crystal LiF show that elastic precursor decay is critically dependent on the origin of the sample. The most obvious differences among samples used are in their concentrat
Publikováno v:
Journal of Applied Physics. 43:744-746
A theoretical method for the reduction of measurements on the decay of elastic precursor shock fronts is presented. The method yields values of the initial pressure‐volume relaxation path behind the front; it requires no assumptions about the form
Autor:
G. R. Fowles, G. W. Swan
Publikováno v:
Physical Review Letters. 30:1023-1025
A new argument is presented that yields the following criterion for plane shocks to be stable: $\ensuremath{-}1l{j}^{2}{(\frac{\mathrm{dv}}{\mathrm{dp}})}_{\mathrm{H}}l1$, where ${j}^{2}=\frac{(p\ensuremath{-}{p}_{0})}{({v}_{0}\ensuremath{-}v)}$ is t
Autor:
W. M. Isbell, G. R. Fowles
Publikováno v:
Journal of Applied Physics. 36:1377-1379
A brief study is described of a simple method for producing plane shock waves in solids at pressures higher than those attainable by conventional explosive methods. Mach reflection of a conically convergent shock in the specimen yields a disk‐shape
Autor:
G. R. Fowles
Publikováno v:
Science (New York, N.Y.). 204(4389)
Although liquid-vapor explosions are widely observed, there is no established explanation for their initiation and propagation. Thermodynamics admits the possibility that superheated liquids can support detonations analogous to those that occur in ch