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

Lovre Krstulovic-Opara, Matej Vesenjak, Petar Marendic, Zoran Ren, Zeljko Domazet

Abstract


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.

Keywords


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

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ISSN 1801-1217 (Print)
ISSN 1805-9422 (Online)
Published by the Czech Technical University in Prague, Faculty of Mechanical Engineering