120-mm Mortar Fuze Reduced Thread Gun Launch Survivability

Abstract

A finite element analysis study was completed on the forward joint of a 120-mm mortar. The purpose of the study was to determine to what degree the adapter threads could be diametrically interrupted without compromising structural integrity during gun launch. The finite element analysis modeled the mortar assembly with a dynamic pressure load. Material nonlinearities were included in the analysis. Contact surfaces in the joint were modeled as threads. The results of the analysis indicated that four circumferential slots could be cut into the joint. For the given gun launch pressure, slots amounting to about 56% of the circumference did not result in stresses exceeding the yield strength of the joint.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2012
Accession Number
ADA554872

Entities

People

  • J. A. Cordes
  • R. Terhune
  • R. Wong
  • S. Defisher

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

DTIC Thesaurus Topics

  • Assembly
  • Engineering
  • Explosives
  • Finite Element Analysis
  • Geometry
  • High Explosives
  • Insensitive Explosives
  • Materials
  • Mechanics
  • Mortar Fuzes
  • Munitions
  • Simulations
  • Statistical Analysis
  • Structural Integrity
  • Survivability
  • Weapons
  • Yield Strength

Readers

  • Mathematics or Statistics
  • Structural Dynamics.
  • ballistics.