engleski

Evaluation of the Poisson's ratio from the 3D laser scanning data

To determine the Poisson’s ratio from a cylindrical compression specimen is a demanding issue in the case of a soft material specimen. In this paper a non-contact method based on the three-dimensional laser scanning technology, together with the CAD surface reconstruction, is presented. Evaluation of the Poisson’s ratio is based on the volumetric changes of a cylindrical compression specimen. It is also shown that the three-dimensional scanning approach can be used for evaluation of engineering stresses when exact cross sectional area of the specimen cannot be precisely determined by standard contact measuring equipment.

3D laser scanning; Poisson’s ratio; engineering stress

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