Intelligent Nondestructive Evaluation of Composite Materials Using Pattern Recognition.

Abstract

A promising ultrasonic non-destructive evaluation (NDE) technique for the characterization of the interphase is given for a single fiber composite. The formal solution to the formulated problem is found via the normal mode expansion method. A computer program is developed for the calculation of the formal solution and its validity is confirmed by two methods: limited case analysis and energy balance analysis. In an attempt to solve the inverse problem of assessing the input parameters from the output parameters, one or more of the input parameters (interphase properties) are assumed to be known as their respective nominal values. For such simplified cases, a graphical technique for solving the inverse problem is developed and demonstrated. Finally, the interphase thickness parameter is shown to be predicted through linear and non-linear multiple regression with high accuracy.

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Document Details

Document Type
Technical Report
Publication Date
Aug 27, 1996
Accession Number
ADA314508

Entities

People

  • James H. Williams Jr.

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Classification
  • Composite Materials
  • Computer Programs
  • Computers
  • Databases
  • Elastic Waves
  • Inverse Problems
  • Materials
  • Mechanical Engineering
  • Pattern Recognition
  • Physical Properties
  • Recognition
  • Test And Evaluation
  • Thickness
  • Two Dimensional
  • Waves

Readers

  • Calculus or Mathematical Analysis
  • Structural Health Monitoring of Composite Structures.
  • Surface Coatings Technology.

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference
  • AI & ML - Machine Learning Algorithms