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Optical method for measuring the surface area of a threaded fastener

Year:

2010

Publication type:

Miscellaneous Publication

Primary Station(s):

Forest Products Laboratory

Source:

Experimental techniques. Vol. 34, no. 4 (July/Aug. 2010): p. 36-39.

Description

This article highlights major aspects of a new optical technique to determine the surface area of a threaded fastener; the theoretical framework has been reported elsewhere. Specifically, this article describes general surface area expressions used in the analysis, details of image acquisition system, and major image processing steps contained within the measurement system. In short, the general approach is to acquire a high contrast image, break the complicated fastener geometry into smaller defined segments with known analytical solutions, calculate the surface area of each individual segment, and add the individual segments to determine the total surface area of the threaded fastener. This method has been successfully used to determine the surface area of threaded fasteners used in recent corrosion experiments.

Citation

Rammer, D.R.; Zelinka, S.L. 2010. Optical method for measuring the surface area of a threaded fastener. Experimental techniques. Vol. 34, no. 4 (July/Aug. 2010): p. 36-39.

Cited

Publication Notes

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
https://www.fs.usda.gov/treesearch/pubs/39484