OPTICAL STRAIN FIELD ANALYSIS PROVIDES NEW INSIGHTS INTO MECHANICAL MATERIAL PROPERTIES

摘要

Contactless optical deformation or strain field analyses calculate the displacement and deformation of a sample or component surface from the digital optical images of its deformed and non-deformed conditions. The two-dimensional strain or deformation distributions obtained add significantly to the informative value of test results. This analysis offers high spatial or time resolution when examining dynamic and static loading processes together with the excellent reproducibility and measuring accuracy afforded by digital image processing algorithms (DIC - Digital Image Correlation).