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- 4Dynamic fragmentation
- 4Planetary materials
- 3Brittle fracture
- 3Ejecta measurements
- 3Particle tracking velocimetry
- 2Brittle materials
Impact Failure of Planetary Materials: Lateral Field Ejecta Measurements using Particle Image VelocimetryDownload
The dynamic fragmentation of a fine grained granitoid material has been examined. Target thicknesses ranged from 7 to 40 mm and impact energies from 12 to 2,500 J. Combined particle image velocimetry and image enhancement techniques are introduced and have been used to measure the size and...
Dynamic Fragmentation of Planetary Materials: Sup-Hypervelocity Ejecta Measurements and Velocity Scaling during Impact TestingDownload
Ejecta velocity measurements were made during impacts into solid planetary materials. Ejecta velocity fields overlie each other when normalized by vmax, v50%mass, and v50%KE; these correspond to the maximum velocity and median values of mass and kinetic energy among ejecta velocities....
Debris Field Kinetics during the Dynamic Fragmentation of Polyphase Natural Ceramic Blocks: Ejecta Measurements and Damage ModesDownload
The dynamic fragmentation of coarse and fine grained granitoid blocks during impact has been examined for energies of 1.9 kJ to 3.0 kJ and 2.7 kJ to 6.8 kJ, respectively. A particle tracking algorithm was developed to measure ejecta size and velocity at the rear of the target for a horizontal...
Dynamic Fragmentation of Planetary Materials: Length Scale Quantification and Semi-Analytical ModellingDownload
The dynamic fragmentation of planetary materials during impact into finite targets has been examined. A particle tracking algorithm was implemented to estimate the size and velocity of fragments ejected from the rear of the target. A total of 76 experiments were performed for four material,...