ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Recently, many research works were concentrated on how to improve the accuracy ofdisplacement fields in digital image correlation (DIC). However, the original displacement fieldscalculated at discrete locations using DIC are unavoidably contaminated by noises. If the strainfields are directly computed by differentiating the original displacement fields, the noises will beamplified even at a higher level and the resulting strain fields are untrustworthy. To acquire reliablyestimation of strain fields, in this paper, Savitaky-Golay (SG) filters are introduced to obtainsmoothed displacement fields and reasonable strain estimation. The principle of two-dimensionalSG filters is described in detail first. Then images of uniaxial tensile and three-point bendingexperiments were used to verify the proposed approach. The resulting smoothed displacement fieldsand strain fields clearly show that the proposed method is simple and effective
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.135.pdf
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