3-D computer vision in experimental mechanics

Abstract

Optical methods that give displacement or strain fields are now widely used in experimental mechanics. Some of the methods can only measure in plane displacements/strains on planar specimens and some of them can give both in plane and out of plane displacement/ strain fields on any kind of specimen (planar or not). In the present paper, the stereovision technique that uses two cameras to measure 3 D displacement/strain fields on any 3 D object is presented. Additionally, a quite inclusive list of references on applications of stereovision (and 3 D DIC) to experimental mechanics is given at the end of the paper.

Damage investigation in CFRP composites using full-field measurement techniques: Combination of digital image stereo-correlation, infrared thermography and X-ray tomography

“…2). Yet, the association of DIC with stereovision based on the use of two cameras considerably improves the technique by providing the 3-D displacement field and the surface strain field of any 3-D object ( [20,21], Fig. 3).…”

Application of Hybrid FEM-DIC Method for Assessment of Low Cost Building Structures

“…3D DIC is a technique, which combines the Digital Image Correlation (for in-plane displacement analysis) with stereovision (for 3D shape measurement) [24]. By using two cameras for observation of the same area of interest, it is possible to obtain the 3D shape of an object.…”

On the Use of Digital Image Correlation for the Analysis of the Dynamic Behavior of Materials

“…5(b)) and a DIC technique are used to register spatial and temporal sequences. This technique is widely used to monitor mechanical tests [53] for which monovision is not sufficient (because, for example, of out-of-plane motions [54]). Stereocorrelation can also be used to monitor ultra high-speed experiments (Fig.…”