Analysis of notch strains combining electronic speckle pattern interferometry and digital image correlation

In this contribution, electronic speckle pattern interferometry (ESPI) and digital image correlation (DIC) are combined for strain analysis around a notch.The investigations are demonstrated using an epoxy notched cantilever bending beam.For the evaluation of the experimental raw data a special method is used, which includes parametrization of the notch surrounding region and optimized smoothing.Thus, the determination of more precise results of the ESPI and DIC analyses is enabled compared to standard evaluation procedures.The deformation measurement methods complement each other profitably, considering the respective limitations and potentials of the ESPI and DIC.