Microstructural Modeling and Representation of Simultaneous Failure Modes in Crystalline Aggregates Subjected to Dynamic Loading Conditions

Abstract

This provides an integrated framework to simultaneously handle different interrelated physical mechanisms, such as a myriad of representative dislocation-density interactions with high and low angle GB interfaces, the growth and coalescence of a population of voids, and how these interactions can lead to either intergranular or transgranular failure. The formation of pile-ups at GB interfaces, as a function of dislocation-density partial and total blockage and absorption at GB interfaces, will be determined and related to behavior at the grain and aggregate levels. How pile-ups form, and whether stress fields accumulate or are relaxed by GB distributions and orientations, GB morphology, and local cohesive strengths, will be determined and related to void nucleation, growth, and coalescence.

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Document Details

Document Type
Technical Report
Publication Date
Jan 09, 2011
Accession Number
ADA545281

Entities

People

  • M.A. Zikry

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Boundaries
  • Computational Science
  • Engineering
  • Equations
  • Failure Mode And Effect Analysis
  • Geometry
  • Grain Boundaries
  • Materials
  • Mechanics
  • North Carolina
  • Plastic Properties
  • Polycrystals
  • Probability Distributions
  • Random Variables
  • Shear Stresses
  • Statistical Functions
  • Students

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.