Effects of Filler Material on Bomb Fracture

Abstract

A six month analytical program was undertaken which investigated the effects of the explosive filler material on the structural failure of bomb casings during impact and penetration into hard targets. A typical cylindrical shell, similar to the present BLU-31B bomb was studied. Both constant and linearly varying wall thicknesses were investigated. To obtain a basic understanding of the filler effect, only an axial load, suddenly applied and held constant, was included. A finite element solution was used to obtain resulting stresses and displacements within the casing. Results indicate the large effect of the filler on the hoop stresses. These stresses are of sufficient magnitude to induce casing failure based on current bomb designs and impacting conditions against concrete targets. Results are presented for a typical Composition B explosive filler material. Hoop stress magnitudes may be obtained for any other filler material, using given relationships between its bulk modulus and density properties compared to the Composition B properties.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1969
Accession Number
AD0862773

Entities

People

  • M. H. Miller
  • Wayne Johnson

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Bearing Strength
  • Bulk Modulus
  • Computer Programs
  • Dynamic Loads
  • Elastic Properties
  • Explosives
  • Export Controls
  • Government (Foreign)
  • Governments
  • Modulus Of Elasticity
  • Radial Stress
  • Resonant Frequency
  • Space Systems
  • Stiffness
  • Stress Waves
  • Wave Propagation

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Nanocomposite Materials Science
  • ballistics.