Experimental Mechanics

, Volume 22, Issue 6, pp 202–209 | Cite as

Application of reflection holography to deformation measurement problems

The versatility of a reflection-holographic method is proven by practical problems solved, and its extension to the monitoring of deformation over long periods of times is indicated
  • A. E. Ennos
  • M. S. Virdee
Article

Abstract

The advantages of using reflection holography for measuring the deformation of structures in a workshop environment are outlined, and practical examples of its application are given. These include (1) a study of crack propagation in an aluminum sheet, showing the yielding of the metal in the vicinity of the crack tip, (2) measurement of the deformation of the platen in a compression testing machine when subjected to the localized force of a load cell, and (3) monitoring of long-term deformation of fiber composites using a real-time version of the holographic technique. Particular attention is paid to the design of the plate-holder mounting and to the photographic processing techniques that are required to achieve optimum results.

Keywords

Aluminum Fluid Dynamics Testing Machine Compression Testing Optimum Result 

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Copyright information

© Society for Experimental Mechanics, Inc. 1982

Authors and Affiliations

  • A. E. Ennos
    • 1
  • M. S. Virdee
    • 1
  1. 1.National Physical LaboratoryTeddingtonUK

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