Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/5831
Title: Laser speckle interferometry in stress analysis
Authors: Zhang, Jingbo
Keywords: DRNTU::Engineering::Manufacturing::Metrology
Issue Date: 2000
Abstract: Laser speckle correlation interferometry enables the measurement of deformation/displacement components and can be used to extract quantitative information on strains/stresses by analysing the fringe patterns. Electronic speckle pattern interferometry (ESPI) or Digital Speckle Pattern Interferometry (DSPI) is a real-time measurement technique which has got wide range of applications in optical metrology in the measurement of deformation, displacement components and their derivatives, shape measurement and Non-Destructive Testing (NDT). It is based on the electronic detection using a Charge Coupled Device (CCD) camera combined with digital image processing of the speckle pattern. The speckled image data of the unloaded and loaded states of the object are processed and the results, in the form of fringe patterns, are displayed in real-time on a TV monitor. This thesis gives an account on the design and development of an orthogonal in-plane displacement sensitive configurations for the ESPI system. Applications of the system for strain analysis especially residual stress measurement using hole-drilling method are exemplified.
URI: http://hdl.handle.net/10356/5831
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MAE Theses

Files in This Item:
File Description SizeFormat 
MAE-THESES_341.pdf
  Restricted Access
15.3 MBAdobe PDFView/Open

Page view(s) 20

498
checked on Sep 24, 2020

Download(s) 20

14
checked on Sep 24, 2020

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.