Understanding of Materials State and its Degradation using Non-Linear Ultrasound (NLU) Approaches - Phase 3

Abstract

This Phase III research proposal was a continuation effort on the Phase I and II work. The overall program focuses on the development of new explorations towards the development of better understanding of non-linear ultrasonic methods for the quantitative materials state evaluation and characterization of damage in metallic alloys. Both theoretical and experimental works were carried out in order to understand the significance of the effects of microscopic damage in metals using the measurements of Non-Linear Effects of Ultrasound (NLU). The Phase III work effort extended the Finite Difference in Time Domain (FDTD) and the mass-spring lattice models (MSLM) to a 2D MSLM with NLU parameters while resolving some of the issues that were observed in Phase II. The experimental results were performed on copper alloys that have damage behavior that can be explained using literature data. The improved understanding of NLU is anticipated to lead to new measurement techniques that have applications in the area of vehicle health monitoring, nondestructive testing, and process monitoring of manufacturing processes.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 2013
Accession Number
ADA592196

Entities

People

  • Krishnan Balasubramaniam

Organizations

  • Indian Institute of Technology Madras

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Alloys
  • Copper
  • Difference Equations
  • Elastic Materials
  • Grain Growth
  • Grain Size
  • Heat Treatment
  • Materials
  • Measurement
  • Mechanical Engineering
  • Modulus Of Elasticity
  • Stress Strain Relations
  • Surface Properties
  • Time Domain
  • Ultrasounds
  • Wave Propagation
  • Waves

Fields of Study

  • Materials science

Readers

  • Computational Fluid Dynamics (CFD)
  • Structural Health Monitoring of Composite Structures.
  • Technical Research and Report Writing.