Effect of out-of-plane specimen movement on the accuracy of the smallest specimen strain measurable using the digital image correlation technique

Strain Measurement in a Specimen Subjected to Out-of-Plane Movement: Using an Open-Source Digital Image Correlation-Based Tool

“…In comparison with ARAMIS used by Poling and Desai (2017) in their previous work, Improved DIC is a viable option. However, there are drawbacks to the open-source option.…”

“…The smallest strains accurately measurable using DIC techniques, over a range of specimen out-of-plane displacement amplitudes, were determined. Pfauth, T., & Poling, J. (2017).…”

“…Consequently, a follow-up investigation was conducted by Poling and Desai (2017) into the effect of out-of-plane specimen motion on the accuracy of the strain measurements using a state-of-the-art, licensed, 2-D DIC-based tool, ARAMIS. The current investigation expands upon this investigation.…”

“…The current investigation expands upon this investigation. Using the same 2-D images obtained by Poling and Desai (2017) in their initial study, the accuracy of an opensource DIC-based mathematical program for MAT-LAB, "Improved DIC," will be determined. This paper describes the approach and results acquired from the Improved DIC software.…”

Developing an International Undergraduate Research Community in College Engineering Programs

“…This study built upon an initial investigation conducted by the collaborating US and Danish partners that concluded that out-ofplane specimen movement results in noise in DIC-based strain measurements 10,11,12 . In the current investigation, the effect of specimen out-of-plane displacement on the accuracy of strain measurements implementing the 2D 13,14 and 3D measurement techniques using both the aforementioned tools was determined over a range of strain values and specimen out-of-plane displacements. The minimum resolutions of the four DIC-based measurement techniques (2D ARAMIS, 3D ARAMIS, 2D iMETRUM, and 3D iMETRUM) in measuring strains under the effect of specimen out-of-plane displacements were determined and their accuracies compared.…”