Microstructural Failure Physics for Structural Failure Prognosis and Diagnosis

Abstract

The physics of microstructural deformation and failure in IN100 was investigated to improve existing tools for predicting and analyzing turbine disc failure. A finite element failure model of damage evolution under cyclic loads was developed and applied to simulate fatigue cracking in a compact tension specimen. A procedure was developed for determining from a fracture surface whether a failed component had experienced overloads and for estimating the overload magnitude and crack delay. A method for extracting and categorizing fracture surface features was developed to assist microstructure-based prognosis models and enable a data base approach for failure analysis.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2003
Accession Number
ADA427340

Entities

People

  • Dennis Grishin
  • Donald A. Shockey
  • Jeffrey W. Simons
  • Takao Kobayashi

Organizations

  • SRI International

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Aircraft Equipment
  • Cracks
  • Cyclic Loads
  • Databases
  • Engineering
  • Failure Analysis
  • Failure Mode And Effect Analysis
  • Fracture (Mechanics)
  • Material Degradation Processes
  • Materials
  • Materials Science
  • Materials Testing
  • Mechanics
  • Microscopes
  • Stress Strain Relations
  • Turbines

Fields of Study

  • Engineering

Readers

  • Structural Health Monitoring of Composite Structures.