NDE Applications of an Optical Technique for Noncontact Measurements of In-Plane Strains

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1989
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Cardenas-Garcia, J.
Rasty, J.
Moulder, J.
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

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Abstract

Measuring whole field strain over two-dimensional fields is important in NDE, especially if such measurements permit the qualitative representation of data, allowing for the imaging and detection of defects. A number of techniques have been used to achieve this, including moire interferometry, holographic interferometry and speckle interferometry. Although all of these methods can provide qualitative images representative of the deformation field, they share the disadvantage of being difficult to analyze quantitatively. This is due to the need for the interpretation of the fringes generated by these techniques, which is time consuming and requires highly skilled practitioners. Additionally, even though these experimental techniques provide a whole-field qualitative appraisal of a two-dimensional field, quantitative data are obtained only at discrete points over the areas of interest.

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Sun Jan 01 00:00:00 UTC 1989