Development of CASI (Computer Aided Speckle Interferometry) and LSS (Laser Speckle Sensor) with Application to Material Response under High Strain Rate, High Temperature, Vibration and Fatigue

Abstract

Two noncontact, remote sensing experimental mechanics techniques using laser speckle are developed. CASI (Computer Aided Speckle Interferometry) is a full field method whereby the speckle formed on the entire specimen surface is captured by a CCD camera and digitally processed to yield stress/strain data. It has been applied to the study of gun oscillation during firing and high strain rate material testing under high temperature and high heating rate. LSS (Laser Speckle Sensor) is a pointwise technique particularly useful for detecting plastic strain, surface texture change due to damage or fatigue. Laser speckle, NDT technique gun oscillation, High strain rate testing, Material damage and fatigue.

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Document Details

Document Type
Technical Report
Publication Date
Feb 10, 1991
Accession Number
ADA248517

Entities

People

  • F. P. Chiang

Organizations

  • Stony Brook University

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Artificial Intelligence
  • Computational Science
  • Computer Vision
  • Crystal Structure
  • Data Processing
  • Detectors
  • Geometry
  • Information Processing
  • Information Science
  • Measurement
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Stress Strain Relations
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Sensor Fusion and Tracking Systems.
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Directed Energy