Nonlinear Dynamic Analysis of Frangible Nosecap for Vertical Launch Antisubmarine Rocket (VLA)

Abstract

Described here is the application of a nonlinear finite element analysis (FEA) technique to predict the structural behaviors for a class of brittle materials that shows near-complete brittleness when loaded in tension, but exhibits some ductility when compressed. An ABAQUS* constitutive model, consisting of an isotropically hardening yield surface, which is active when the stress state is dominantly compressive, and an independent crack detection surface to determine if a point in the material fails by cracking in tension, is employed to simulate the failure of the brittle material. The application of the technique to determine if a potential frangible nosecap design of the Vertical Launch Antisubmarine Rocket (VIA) would break up as intended upon water impact for a given entry condition is presented as an example.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1994
Accession Number
ADA276835

Entities

People

  • R. C. Shaw

Organizations

  • Naval Command, Control and Ocean Surveillance Center

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Anti-Submarine Missiles
  • Computer Programs
  • Computers
  • Concrete
  • Dynamic Pressure
  • Finite Element Analysis
  • Frangible
  • Geometry
  • Materials
  • Mechanics
  • Plastic Deformation
  • Pressure Distribution
  • Rockets
  • Stress Strain Relations
  • Stress Waves
  • Stresses
  • Tensile Strength

Readers

  • Acoustical Oceanography.
  • Combustion and Flow Dynamics.
  • Materials Science (Mechanical Engineering).