| EPSRC Reference: |
GR/M57835/01 |
| Title: |
IN-SITU QUANTITATIVE FLAW DETECTION USING ADVANCED OPTICAL INSPECTION TECHNIQUES |
| Principal Investigator: |
Huntley, Professor JM |
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| Project Partners: |
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| Department: |
Mechanical Engineering |
| Organisation: |
Loughborough University |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 April 2000 |
Ends: |
30 November 2003 |
Value (£): |
191,673
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
Manufacturing |
| Construction |
Energy |
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Summary on Grant Application Form |
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The detection of structural defects is a ubiquitous problem across many industries. Advanced optical inspection techniques based on speckle interferometry and shearography have so far provided primarily qualitative information. The aim of this proposal is to extend such techniques to provide quantitative measurements of flaw geometry, for both surface and sub-surface defects, through the fusion of experimentally measured shape and surface displacement field data using the finite element method. Two solution methods to the inverse problem are proposed: one based on forward FE calculations combined with neural network classifiers; the second involving direct calculation f the elastic constants on a three-dimensional mesh representing the component. The methods exploit the ability to measure large numbers (~100,000) of independent co-ordinates and displacement vectors in a few seconds using a patented technique ( temporal phase unwrapping ) implemented on a pipeline image processor. Further developments to the system will include temporal least squares fitting for improved dynamic range, and active phase and phase-gradient stabilisation. The main application will be the detection of delamination defects in carbon fibre composite panels; however, the techniques to be developed are generic and will be of interest to a wide range of companies concerned with structural integrity issues.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.lboro.ac.uk |