Fluorescent digital image correlation techniques in experimental mechanics

Hu, Zengyun; Xu, Tingge; Wang, Xuemin; Xie, Zhihong; Luo, Huiyang; He, Yong; Guo, Lei; Li, YuanPing; Gan, RongZhu; Lu, Hongbing

doi:10.1007/s11431-017-9103-8

Cited by 30 publications

(25 citation statements)

References 127 publications

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“…19, No. 1 (2018) Marsili R, Rossi G. Mechanical components dynamic characterization using thermoelastic stress analysis and … 4 painted on a loaded specimen, in order to measure the deformation field on the specimen surface [2]. Pictures must be taken in undeformed and deformed configuration.…”

Section:  mentioning

confidence: 99%

Mechanical components dynamic characterization using thermoelastic stress analysis and digital image correlation

Marsili

Rossi

2018

Diagnostyka

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In this work the possibility to characterize mechanical components combining thermoelastic measurement technique (TSA) and digital image correlation (DIC) is studied. The combination of these two different methodologies allows to analyze thermo-mechanical characteristics of materials such as plastic and rubber, which are difficult to study with the only thermoelastic methodology. The digital image correlation allows to determinate the first invariant of deformation ε1, using a differential thermocamera. Lack of adiabatic conditions, essential for methodology use, makes analysis not simple. Digital image correlation allows to obtain the same information by correlating digital images acquired during static or dynamic deformationof an object, but with limitations linked to acquisition system. An accurate analysis is dedicated to the study of first invariant of deformation related to Young's module variation, performed by load cycles with variable amplitude and displacement. Comparative analysis between the two measurement methodologies has been performed on rubber samples loaded by dynamic compression.

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Section:  mentioning

confidence: 99%

Mechanical components dynamic characterization using thermoelastic stress analysis and digital image correlation

Marsili

Rossi

2018

Diagnostyka

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“…Digital Image Correlation allows to maintain track of displacements on the external surfaces of the examined objects [2]. The DIC camera system required special reference points in stochastic intensity pattern to observe local movement on the external surface [3]. The surface is divided to small regions (subsets) containing N x N pixels [4].…”

Section: Dic -Theorymentioning

confidence: 99%

Strain Optical Analysis of 3D Printing Elements in Different Additive Technologies in Comparison with the Finite Element Method

Kluska

Gruda

Majca-Nowak

2018

Transactions on Aerospace Research

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Research included in this article were conducted with a project: ‘Additive technology used in conduction with optical methods for rapid prototyping of 3D printed models’. In this article intellectualized three various 3D printing technologies: Fused Deposition Modelling (FDM), Selective Laser Sintering (SLS) and Material Jetting (PolyJet). Also, there was presented theory of Digital Image Correlation (DIC) as an optical method for strain analysis. The limitations of DIC system have been tested and detected. The test result for DIC system were shown for each method of additive technologies and the results were compared to Finite Element Method (FEM). Test specimens were printed in selected technologies for reference. DIC system has been used for displacement state in loaded objects. The last paragraph contains both summary and tests results.

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“…The DIC method recommended for 3D measurements is a stereoscopic technique employing two CCD cameras, light sources and advanced software (GOM source). This method involves applying a special pattern represented by black dots on a grey background (Chu et al, 1985;Lord, 2009). A mathematical description of the DIC is available in the literature (Chu et al, 1985, for example).…”

Section: Introductionmentioning

confidence: 99%

“…This method involves applying a special pattern represented by black dots on a grey background (Chu et al, 1985;Lord, 2009). A mathematical description of the DIC is available in the literature (Chu et al, 1985, for example). Markers are chosen by a DIC device for obtaining x, y and z coordinates, and are followed by the DIC system up to specimen fracture.…”

Section: Introductionmentioning

confidence: 99%

Investigations of material behaviour under monotonic tension using a Digital Image Correlation system

Szymczak

2018

jtam

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The paper reports behaviour of engineering materials for different kinds of notches, i.e. having U , V shapes. Their variants with respect to dimensions are illustrated in static and fatigue tests. The influence of these types of geometrical imperfections on material fatigue is presented using variations of the Wöhler curve, number of cycles to failure and the fatigue notch factor. Results of experiments conducted by the use of the Digital Image Correlation system called 4M Aramis are illustrated. Courses of tensile characteristics of the 41Cr4 steel, obtained by means of both techniques: extensometer and DIC are compared. They indicated that the DIC technique can be a good tool for determination of mechanical properties. The equivalent strain full-field distributions on specimens tensioned with and without imperfections up to material fracture are presented. The influence of U and V notches on variations of tensile curves is shown.

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Fluorescent digital image correlation techniques in experimental mechanics

Cited by 30 publications

References 127 publications

Mechanical components dynamic characterization using thermoelastic stress analysis and digital image correlation

Mechanical components dynamic characterization using thermoelastic stress analysis and digital image correlation

Strain Optical Analysis of 3D Printing Elements in Different Additive Technologies in Comparison with the Finite Element Method

Investigations of material behaviour under monotonic tension using a Digital Image Correlation system

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