Analytical Summary. Part 5. Plastic Flow in Bars and Shells

Abstract

An analysis is made of elastic and plastic equilibria in a triangular sheet and in a cylindrical shell. The published data on the deformation and fracture of bars and tubes are reviewed and summarized. Stress-strain diagrams and deformation contours have been obtained on tension and compression specimens of the steel in 37mm PP Type T21 projectiles. The von Karman theory for the propagation of plastic waves in bars is reviewed. The role of the rotation of the axes of strain rate, and the appearance of irrotational flow are analysed. Deformation contours, stream lines and contours of equal velocity potential are given for the irrotational flow in a bar or jet. A few 37mm PP type T21 projectiles have been fired at an unyielding plate. An analysis is made of the plastic flow and fracture in the projectiles, as revealed by sectioning and etching.

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Document Details

Document Type
Technical Report
Publication Date
Jul 14, 1952
Accession Number
AD0896220

Entities

People

  • A. V. Hershey

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Armor Plate
  • Base Lines
  • Bending Moments
  • Dynamic Pressure
  • Elastic Waves
  • Equations
  • Geometric Forms
  • Geometry
  • Materials
  • Mechanics
  • Phase Velocity
  • Plastic Flow
  • Shock Waves
  • Stress Strain Relations
  • Stresses
  • Tensile Strength
  • Time Intervals

Fields of Study

  • Engineering

Readers

  • Materials Science (Mechanical Engineering).
  • Structural Dynamics.
  • ballistics.