Impact Strength Analysis of a Rivited Joint in the M240 Machine Gun.

Abstract

A proposed modification of the shape of a slot in the inner wall of the lower receiver of the M240 machine gun is investigated to determine the effect of the change on the life of the weapon. The slot helps provide restraint for the locking shoulders which support the rearward thrust of the bolt and bolt carrier. Impact and fatigue loading are considered. Estimates of the stress in the rivets and restraints of the locking shoulder are made based on (1) the assumption of even distribution of load across areas in shear, and (2) finite element analysis of the locking shoulder/rivet/receiver combination. Results of both analyses indicate that the slot can be modified without reducing the life of the weapon. Keywords include: small arms weapon design; strength analysis; fatigue analysis; impact; stress; finite element analysis.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1985
Accession Number
ADA154894

Entities

People

  • F. E. Bowles

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Ammunition
  • Cartridge Cases
  • Computer Programs
  • Fasteners
  • Finite Element Analysis
  • Geometry
  • Interior Ballistics
  • Materials
  • Mechanical Engineering
  • Mechanics
  • Personal Computers
  • Projectiles
  • Residuals
  • Riveted Joints
  • Tensile Strength
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Electrical Engineering
  • Munitions and Ordnance Engineering
  • Structural Health Monitoring of Composite Structures.