Implementation of Schoenfield-Wright Failure Criterion into a Three-Dimensional Adiabatic Shear Band Model in CTH

Abstract

A failure criterion based on material response and scaling laws is implemented into a three-dimensional shear band nucleation and propagation model being developed in CTH, a Eulerian wave propagation code. Numerical simulations of plastic localization in Ti-6Al-4V armor plates due to steel fragment impact are carried out, before and after the implementation of the failure criterion. Adiabatic shearing is depicted as the impact speed approaches the ballistic limit velocity, confirming experimental observations. The capacity to calculate Grady-Kipp and Wright-Ockendon length scales are added to CTH to be used in conjunction with shear band model. Computational aspects of shear band spacing effects are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2004
Accession Number
ADA428732

Entities

People

  • Müge Fermen-coker

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Armor
  • Armor Plate
  • Failure Mode And Effect Analysis
  • Geometric Forms
  • Geometry
  • Lines (Geometry)
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Shear Bands
  • Simulations
  • Three Dimensional
  • Titanium Alloys
  • Two Dimensional
  • Wave Propagation

Readers

  • Computational Fluid Dynamics (CFD)
  • Explosive Engineering.
  • Mechanical Engineering/Mechanics of Materials.

Technology Areas

  • Space