Dynamic Fragmentation of Planetary Materials: Length Scale Quantification and Semi-Analytical Modelling

• Author(s) / Creator(s)

  • Rogers, Robert
  • Spray, John
  • Hogan, James

• 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, target thicknesses of 7 mm to 55 mm, and impact energies of 10 J to 6,810 J. Semi-empirical models were developed from non-dimensional groups to predict key experimental results. This includes the transformation of incoming projectile kinetic energy to the ejecta kinetic energy. The amount of impact energy converted to kinetic energy of ejecta was found to increase from 2% to 18% over the range of test conditions. Energy dissipated into expanding the field laterally was found to be small in comparison to the streamwise direction (KEy/KEx= 4 %).

• Date created

  2013

• Subjects / Keywords

  • Particle tracking
  • Dynamic fragmentation
  • Planetary materials
  • Brittle fracture
  • Impact testing

• Type of Item

  Article (Published)

• DOI

  https://doi.org/10.7939/R3C24R20G

• License

  Attribution-NonCommerical-NoDerivs 4.0 International