THE EFFECTS OF SOLID STRENGTH ON THE PROPAGATION AND ATTENUATION OF SPHERICAL AND PLANE SHOCK WAVES,

Abstract

To demonstrate the titled effects, basic equations in Lagrangian coordinates are derived for spherical and plane waves in an elastic-perfectly plastic solid. The solution is first discussed qualitatively on the basis of the method of characteristics and then is obtained numerically by using a finite difference method for a shock wave induced by a square stress pulse in time at a boundary. In agreement with Frasier's preliminary conclusions from the results of hypervelocity impact experiments in wax, the results show that the effects of solid strength are significant when the strength of the shock wave is within two orders of magnitude of the yield stress of the material. It is also indicated that precise control of the loading process is necessary to detect experimentally the possible effects of solid strength on the attenuation of shock waves. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1967
Accession Number
AD0663820

Entities

People

  • Chi-hung Mok

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Agreements
  • Attenuation
  • Boundaries
  • Equations
  • Hypervelocity Impact
  • Impact
  • Materials
  • Method Of Characteristics
  • Plane Waves
  • Shock
  • Shock Waves
  • Waves

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Materials Science (Mechanical Engineering).

Technology Areas

  • Hypersonics