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DIC Systems

NIST (National Institute of Standards and Technology) using Vic-3D for digital image correlation (DIC)

NIST is using the Vic-3D dig­i­tal image cor­re­la­tion (DIC) sys­tem to ana­lyze stress in bridges. By using DIC, they try to under­stand the impact of stress­es and strains on the met­al con­nec­tors of bridges in order to avoid dam­age or failure.

NIST is pre-strain­ing a wide plate with dig­i­tal image cor­re­la­tion (DIC) to deter­mine the small-scale spec­i­men sec­tion­ing plan:

https://www.nist.gov/video/pre-straining-pipeline-steel-plate

NIST is con­duct­ing a CWP test with dig­i­tal image cor­re­la­tion (DIC) to deter­mine local and remote strains used to deter­mine the Ten­sile Strain Capac­i­ty of a flawed pipe girth-weld:

https://www.nist.gov/video/curved-wide-plate-testing

NIST is mak­ing an SE(T) test with dig­i­tal image cor­re­la­tion (DIC) show­ing the asym­met­ric strain gra­di­ent of a spec­i­men notched in the heat-affect­ed zone:

https://www.nist.gov/video/single-edge-notch-tension-testing

The Vic-2D System

Vic-2D can mea­sure in-plane dis­place­ments and strains on pla­nar spec­i­mens. The set­up is sim­ple, for sam­ple prepa­ra­tion only the appli­ca­tion of a ran­dom speck­ly pat­tern is ness­esary. No spe­cial illu­mi­na­tion or lasers are required.

 

 

 

 

We offer com­plete mea­sure­ment sys­tems for a wide range of full-field in-plane defor­ma­tion mea­sure­ment tasks.

  • White-light sys­tem
  • No cal­i­bra­tion required
  • real-time data pro­cess­ing (> 50Hz)
  • Sam­ple size <1mm and >10m possible
  • Sim­ple spec­i­men prepa­ra­tion using paint
  • Syn­chro­nized load data acquisition
  • Avail­able ana­log out­put for machine control
  • Very high strain and dis­place­ment limits

 

We also pro­vide com­po­nents as well as cus­tom mea­sure­ment sys­tems for demand­ing appli­ca­tions includ­ing high tem­per­a­ture, high­er speeds, and very small- or large-scale samples.

 

Application

The Vic-2D sys­tem is used where strain dis­tri­b­u­tions need to be mea­sured on flat spec­i­mens. Appli­ca­tions include frac­ture mechan­ics (COD mea­sure­ment), bi-axi­al ten­sion tests of films, deter­mi­na­tion of strain local­iza­tion around cracks or notch­es as well as many appli­ca­tions in FE mod­el verification.

 

 

Application example

Strain Mea­sure­ment — 2D Fatigue Test