Quantification of Three-Dimensional Surface Deformation using Global Digital Image Correlation

Abstract

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Numerical–experimental assessment of roughness-induced metal–polymer interface failure

“…Point of departure is the newly developed methodology for characterizing an evolving surface profile in previous work (Van Beeck et al, 2014). A Finite Element based Digital Image Correlation (FE-DIC) technique enables extraction of the three-dimensional surface displacements from measured sequential surface height profiles, taken from confocal optical measurements.…”

“…Because the FE-DIC calculations require the difference between two height profiles to be small, an incremental method was used. A new height profile was measured after each strain increment (De ¼ 0:25%), during which the progressive changes in height were small (Van Beeck et al, 2014).…”

“…The discretization size was based on the optimum of the verification analysis by Van Beeck et al (2014), i.e. approximately 450 pixels per triangular element.…”

“…A methodology to experimentally quantify the three-dimensional displacement field of an evolving surface profile was recently developed and discussed in Van Beeck et al, 2014. A Finite Element based Digital Image Correlation (FE-DIC) methodology was developed to extract the full-field displacements of an evolving surface. The FE-DIC method is applied here to obtain the full-field surface displacements of an ECC steel deformed in tension.…”

“…These fluctuations are likely due to the adopted incremental calculation procedure, measurement noise and small-scale roughening events that are not captured by the adopted discretization (Van Beeck et al, 2014). The experimentally acquired displacement fields therefore still require filtering, since these fluctuations may cause non physical behaviour if used directly in numerical simulations.…”