Measurement Method for Displacement and Strain on Two- and Three-dimensional Surface by Using Digital Image Correlation

2014 ◽  
Vol 55 (646) ◽  
pp. 979-983 ◽  
Author(s):  
Satoru YONEYAMA
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Measurement Method ◽  
Three Dimensional ◽  
Image Correlation ◽  
Dimensional Surface

scholarly journals Quantification of Three-Dimensional Surface Deformation using Global Digital Image Correlation

2013 ◽  
Vol 54 (4) ◽  
pp. 557-570 ◽  
Author(s):  
J. van Beeck ◽  
J. Neggers ◽  
P. J. G. Schreurs ◽  
J. P. M. Hoefnagels ◽  
M. G. D. Geers
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Surface Deformation ◽  
Three Dimensional ◽  
Image Correlation ◽  
Dimensional Surface

scholarly journals A new methodology to identify minimum strain anatomical lines based on 3-D digital image correlation

2017 ◽  
Vol 8 (2) ◽  
pp. 337-347 ◽  
Author(s):  
Jorge Barrios-Muriel ◽  
Francisco Javier Alonso Sánchez ◽  
David Rodríguez Salgado ◽  
Francisco Romero-Sánchez
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Strain Field ◽  
Three Dimensional ◽  
Wearable Devices ◽  
Plane Motion ◽  
Human Motion ◽  
The Body ◽  
Image Correlation ◽  
Minimum Deformation

Abstract. Today there is continuous development of wearable devices in various fields such as sportswear, orthotics and personal gadgets, among others. The design of these devices involves the human body as a support environment. Based on this premise, the development of wearable devices requires an improved understanding of the skin strain field of the body segment during human motion. This paper presents a methodology based on a three dimensional digital image correlation (3D-DIC) system to measure the skin strain field and to estimate anatomical lines with minimum deformation as design criteria for the aforementioned wearable devices. The errors of displacement and strain measurement related to 3-D reconstruction and out-of-plane motion are investigated and the results are acceptable in the case of large deformation. This approach can be an effective tool to improve the design of wearable devices in the clinical orthopaedics and ergonomics fields, where comfort plays a key role in supporting the rehabilitation process.

Assessment of digital image correlation vibrometry in the presence of thermal flow disturbance

2021 ◽  
Vol 263 (3) ◽  
pp. 3861-3870
Author(s):  
Kenji Homma ◽  
Paul R. Braunwart ◽  
Patrick L. Clavette
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Air Flow ◽  
Three Dimensional ◽  
Laser Doppler Vibrometer ◽  
Image Correlation ◽  
Stereo Pair ◽  
Structural Vibrations ◽  
Heated Air ◽  
Extraneous Noise

Digital Image Correlation (DIC) is an image-based method for measuring displacement and/or stain on the surface of a structure. When coupled with a stereo pair of highspeed cameras, DIC can also capture three-dimensional dynamic deformation of a structure under vibratory loading. However, high frequency and small amplitude displacement typically associated with structural vibrations mean that extra care is required during measurement and data processing. It becomes more challenging when thermal disturbances are present in the optical path, for example from a heated air flow, which introduces extraneous noise due to disturbances in the refractive index. In the present study, a simple composite plate was vibrated under a shaker excitation and stereo DIC measurements were performed. The obtained vibratory displacement results were compared against accelerometers and a laser Doppler vibrometer. Heated air flow was introduced in front of the plate to observe the effects of thermal disturbances on the DIC measurements. Although the contributions from the thermal disturbances were clearly visible in the DIC displacement data, it was shown that the vibratory deflections of the structure could still be extracted by post processing of the DIC data.

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