Abstract
This contribution deals with investigations of strain fields at the specimen surface. A notched cantilever beam made of epoxy was analyzed. In the notch-surrounding area inhomogeneous strain distributions with large gradients occur. For the detection of these strain fields, high-performance measuring methods and special evaluation methods are required. The detection of in-plane displacement fields was performed using Electronic Speckle Pattern Interferometry (ESPI). Based on B-spline approximation of the displacements, strains were determined. Besides a global evaluation, a parametrization of the notch-surrounding area was performed. The results show significant improvement compared to analyses without using the parametrization.
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