Rock mechanics

, Volume 15, Issue 1, pp 25–40 | Cite as

Behavior of diorite under impact by variously-shaped projectiles

  • Akihiko Kumano
  • Werner Goldsmith


Behavior of Diorite Under Impact by Variously-Shaped Projectiles

The effects of striker diameter and tip geometry on the crater and crack network produced in diorite by normal projectile impact in the energy range from 4–30 J was investigated. Ejecta kinematics were determined by high-speed photography; elastic strain wave propagation was measured by embedded gages in a composite specimen; and the damage pattern was ascertained from an examination of the sectioned specimen. It was found that the projectile nose shape exerts a strong influence on the shape of the elastic transient, on the crater geometry, on the extent of the crack network and on the average size of the ejecta. The crater depth was found to be the most repeatable parameter in identical tests using the same striker and initial kinetic energy.


Damage Pattern Initial Kinetic Energy Crater Depth Strain Wave Sectioned Specimen 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Kabo, M., Goldsmith, W., Sackman, J. L.: Impact and Comminution Processes in Soft and Hard Rock, Rock Mechanics9 213–243 (1977).Google Scholar
  2. 2.
    Gates, G. R.: Clay Mineral Composition of Borate Deposits and Associated Strata at Boron, California, Science130 102 (1959).Google Scholar
  3. 3.
    Goldsmith, W., Austin, C. F.: Some Dynamic Characteristics of Rocks. Stress Waves in Anelastic Solids, Proc. of an Intern. Symp. on Stress Waves in Anelastic Solids. Prager, W., Kolsky, H. (eds.), Berlin, Heidelberg, New York: Springer 1964.Google Scholar
  4. 4.
    Goldsmith, W., Taylor, R. L.: Wave Traversal and Comminution of Rock. First Annual Report, Grant GI-39121, National Science Foundation/RANN, University of California, Berkeley, June 15, 1974. NTIS No. NSF-RA-T-74-042.Google Scholar
  5. 5.
    Tsai, Y. M., Kolsky, H.: A Study of the Fracture Produced in Glass Blocks by Impact. J. Mech. Phys. Solids15 263–273 (1967).Google Scholar
  6. 6.
    Shockey, D. A.,et al.: Fragmentation of Rock under Dynamic Loads. Int. J. Rock Mech. Min. Sci. & Geochem. Abstr.11 303–317 (1974).Google Scholar
  7. 7.
    Shockey, D. A.,et al.: Development of a Capability for Predicting Cratering and Fragmentation Behavior in Rock. Final Report, Contract No. 001-74-C-0195. Defense Nuclear Agency Report, DNA 3730F, 1975.Google Scholar

Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • Akihiko Kumano
    • 1
  • Werner Goldsmith
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of CaliforniaBerkeleyUSA

Personalised recommendations