A Nonlinear Model for the Dynamics of Penetration Into Geological Targets

[+] Author and Article Information
F. R. Norwood, M. P. Sears

Computational Physics and Mechanics Division II-5533, Sandia National Laboratories, Albuquerque, N. M. 87185

J. Appl. Mech 49(1), 26-30 (Mar 01, 1982) (5 pages) doi:10.1115/1.3162065 History: Received June 01, 1981; Revised October 01, 1981; Online July 21, 2009


A general theory is developed for predicting stress and force histories for normal impact and penetration of geological targets by conical-nosed projectiles. To account for general material properties, the target medium is described by arbitrary hydrostat and shear failure-pressure relations. Using the cylindrical cavity approximation, the penetration dynamics reduce to a problem of radially symmetric stress wave propagation involving a nonlinear, ordinary, differential equation in terms of similarity variables. This equation is solved numerically by a shooting technique which is initiated by asymptotic values at the wave front. Numerical results are given for the stresses on the penetrator nose for some specific material models.

Copyright © 1982 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In