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Uncertainties of Digital Image Correlation Due to Pattern Degradation at Large Strain

Published

Author(s)

Mark A. Iadicola

Abstract

A method to measure the displacement uncertainty increase, due in part to pattern breakdown at large strains is described. The method is similar to rigid body displacement methods used in prior work. Multiple pattern assessment metrics from the literature are calculated for the same experiments to determine if the trends in the uncertainty are consistent with the trends seen in the metrics. The pattern assessments are carried out over the entire region of interest for correlation, but some of the metrics are based on the size of the correlation subset. The results show better agreement between the increase in displacement uncertainties and the subset size based metrics, then the metrics that measure the entire region of interest regardless of the subset size.
Proceedings Title
Proceeding of the Society for Experimental Mechanics 2015 Annual Meeting
Conference Dates
June 8-11, 2015
Conference Location
Costa Mesa, CA
Conference Title
SEM 2015 Annual Conference and Exposition on Experimental and Applied Mechanics

Keywords

digital image correlation, DIC, displacement uncertainty, pattern assessment, large strain

Citation

Iadicola, M. (2015), Uncertainties of Digital Image Correlation Due to Pattern Degradation at Large Strain, Proceeding of the Society for Experimental Mechanics 2015 Annual Meeting, Costa Mesa, CA (Accessed April 13, 2024)
Created June 8, 2015, Updated March 23, 2017