scholarly journals Assessment of the relationship between deformation characteristics and the presence of calcification in human atheromatous plaques using uniaxial stretching evaluations with digital image correlation, CT scanning and histological examination

2016 ◽  
Vol 11 (3) ◽  
pp. 15-00611-15-00611
Author(s):  
Hamed ESMAEILI MONIR ◽  
Hiroshi YAMADA ◽  
Noriyuki SAKATA ◽  
Yasuyuki MORITA ◽  
Yutaka NAKASHIMA
Keyword(s):  
Digital Image Correlation ◽  
Histological Examination ◽  
Digital Image ◽  
Ct Scanning ◽  
Image Correlation ◽  
Deformation Characteristics ◽  
Uniaxial Stretching ◽  
Atheromatous Plaques ◽  
The Relationship

scholarly journals Production and Digital Image Correlation Analysis of Titanium Foams with Different Pore Morphologies as a Bone-Substitute Material

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Mohammed Shbeh ◽  
Elif Oner ◽  
Ammar Al-Rubaye ◽  
Russell Goodall
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Bone Substitute ◽  
High Surface ◽  
High Surface Area ◽  
Image Correlation ◽  
Bone Substitute Material ◽  
Space Holder ◽  
Substitute Material ◽  
The Relationship

Ti foams are mesoporous structured materials that are characterized by their high surface area and interconnected porosity with a huge potential for biomedical applications. In this study, we investigated the production of titanium foams with different pore morphologies as a bone-substitute material via the addition of different amounts, shapes, and sizes of the space holder. Furthermore, we also carried out strain analysis using digital image correlation (DIC) in order to analyse the strain distribution across the porous samples. In addition, the nature of the relationship between the amount of the space holder added and final amount of porosity in the foams produced was also examined. The results demonstrated that the relationship between the space holder amount and porosity in the samples follows a complex one-phase exponential decay function in an increasing form. Our findings also suggest that the shape of the space holder does not play a significant role in dictating the porosity of the foams produced in the current study. However, the space holder’s shape does have a substantial role in dictating the mechanical properties of the foams produced, where Ti foams produced using a cubic or irregular space holder were found to have a lower yield stresses than those made with the spherical space holder.

scholarly journals The Dynamic Buckling of Stiffened Panels –A Study Using High Speed Digital Image Correlation

2010 ◽  
Vol 24-25 ◽  
pp. 331-336 ◽  
Author(s):  
C.A. Featherston ◽  
J. Mortimer ◽  
Mark J. Eaton ◽  
Richard L. Burguete ◽  
Rhiannon Johns
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
High Speed ◽  
Buckling Load ◽  
Image Correlation ◽  
Stiffened Panel ◽  
Load Factor ◽  
Buckling Loads ◽  
Stiffened Panels ◽  
The Relationship

For a structure subjected to an intermediate velocity impact in which the duration of loading is in the order of milliseconds and in excess of the period of it’s first free vibration mode there is a relationship between impact duration and buckling load. Although this relationship results in higher buckling loads for shorter duration impacts, the precise nature of the correlation depends on a number of other factors, one of which is geometry. Since the design of many lightweight structures subject to dynamic loading in this intermediate range is based on the use of a static buckling load to which a load factor is then applied, it is essential that this factor accurately represents the relationship between the two and takes of account of any variations. Failure to do so will at least result in an over designed structure and at worst in catastrophic failure. A series of finite element analyses (FEA) have been performed in order to determine the relationship between dynamic and static buckling loads for a range of stiffened panels with differing radii of curvature. This paper describes preliminary tests performed to determine the feasibility of using high speed digital image correlation (DIC) to study such an impact and hence provide validation of the earlier FEA analyses. These are performed on a longitudinally stiffened panel subject to uniaxial compression, clamped within a rig designed to provide built-in end conditions and allow motion of one end in the direction of loading only. The specimen is tested using an accelerated drop test rig. Impact load is monitored throughout using a load cell. Full field displacement contours are obtained using a high speed DIC system. Results are presented which demonstrate deflection contours during and after impact enabling the path of the shock wave through the specimens to be determined. An initial comparison is then made the FEA results.

Study of the deformation characteristics of window security film by digital image correlation techniques

2009 ◽  
Vol 47 (3-4) ◽  
pp. 390-397 ◽  
Author(s):  
Wim Van Paepegem ◽  
Assen A. Shulev ◽  
Ilia R. Roussev ◽  
Stijn De Pauw ◽  
Joris Degrieck ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Image Correlation ◽  
Deformation Characteristics ◽  
Correlation Techniques

scholarly journals Speckle pattern optimization for DIC technologies

2021 ◽  
Author(s):  
Szabolcs Szalai ◽  
Gábor Dogossy
Keyword(s):  
Digital Image Correlation ◽  
Strain Gage ◽  
Digital Image ◽  
Speckle Pattern ◽  
Image Correlation ◽  
Important Advance ◽  
Deformation Strain ◽  
Technological Issue ◽  
The Relationship ◽  
Scientific Fields

This paper contains the relation between speckle pattern and Digital Image Correlation (DIC). The most important advance in experimental mechanics has been DIC since the strain gage. The deformation (strain) of an object can be visualized by DIC. Among all scientific fields, the DIC Technologies have seen a dynamic increase. The relationship between the paint and the sample - as the patterns mediate the deformation to the cameras - has been the most important technological issue. In this article the method developed for the detection of isolated particles in alloys is used to characterize the spots, which help the best speckle pattern has determined.

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