On Elastic-Plastic Analysis of an Overloaded Breech Ring Using NASTRAN

Abstract

The piece-wise linear analysis option of the NASTRAN code was used to analyze a photoplastic model for sliding breech mechanism. A two-dimensional finite element representation for the breech ring was chosen and the material was made of polycarbonate resin. The aluminum block was regarded as rigid and the width of contact was assumed to remain unchanged during loading. The displacements and stresses in the breech ring were obtained for loading in the elastic as well as plastic range. The maximum tensile stresses before and after complete unloading were obtained and compared with numerical and experimental results. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1981
Accession Number
ADA105228

Entities

People

  • P. C. Chen

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

DTIC Thesaurus Topics

  • Breech Mechanisms
  • Coordinate Systems
  • Displacement
  • Elements
  • Materials
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Numerical Analysis
  • Reliability
  • Residual Stress
  • Stress Analysis
  • Stresses
  • Tensile Stress
  • Two Dimensional
  • Unloading
  • Weapons

Fields of Study

  • Engineering

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Dynamics.
  • ballistics.