Modelling Particle - Particle Interaction at the Micro Scale.

Abstract

IN high-strength alloys, microstructure can influence toughness in a manner not yet fully quantified. Computational mechanics offers a tool whereby the events leading to fracture may be simulated, but the success of such an enterprise depends heavily upon the quality of the model employed. This report outlines a sequence of events thought to precede ductile fracture and presents a finite element model designed to capture the main events. The model is considered to be an improvement over an earlier one, and data are presented to support this conclusion. Work of this type requires a fine degree of resolution which normally will entail very large, detailed finite element maps. Such map sizes could easily exceed the capacity of research computers, and a substructuring technique is essential to pursue research of this sort. Such a technique has been developed for use without modification to an existing code, i.e., it may be implemented on a standard finite element program directly. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 15, 1983
Accession Number
ADA133969

Entities

People

  • J. L. Swedlow

Organizations

  • Carnegie Mellon University

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Composite Materials
  • Computational Science
  • Elastic Properties
  • Engineering
  • Engineers
  • Finite Element Analysis
  • Fracture (Mechanics)
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Science
  • Mechanical Engineering
  • Mechanics
  • Models
  • Numerical Analysis
  • Stress Strain Relations

Readers

  • Computational Fluid Dynamics (CFD)
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Systems Analysis and Design