Application of reflection holography to deformation measurement problems
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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.
KeywordsAluminum Fluid Dynamics Testing Machine Compression Testing Optimum Result
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