Vic-Volume — Software

VIC Volume1The new Vic-Volu­me soft­ware by Cor­re­la­ted Solu­ti­ons is an exci­ting addi­ti­on to the Vic image cor­re­la­ti­on pro­duct line. Vic-Volu­me uti­li­zes volu­metric images from X‑Rays or CT-Scan­ners to mea­su­re inter­nal defor­ma­ti­on of a spe­ci­men under an app­lied load. Vic-Volu­me ana­ly­zes the acqui­red images to crea­te three-dimen­sio­nal volu­metric dis­pla­ce­ment and strain data of the specimen’s inter­nal beha­vi­or. The resul­ting data is a full-field con­tour plot of the defor­ma­ti­on data that can be view­ed, ani­ma­ted, and extrac­ted for FEA vali­da­ti­on. The image to the left dis­plays the inter­nal strain (Ezz) of a rub­ber puck under­go­ing compression.
 X

 

 X

Technology Background

VIC Volume2

Digi­tal Image Cor­re­la­ti­on (DIC) has found widespread popu­la­ri­ty among sci­en­tists, rese­ar­chers and engi­neers across the glo­be due to its accu­ra­cy, robust­ness, ver­sa­ti­li­ty, fle­xi­bi­li­ty and over­all ease of use. DIC is com­mon­ly used to mea­su­re 2D and 3D sur­face defor­ma­ti­on and strain uti­li­zing white light machi­ne visi­on digi­tal came­ras. Cor­re­la­ted Solu­ti­ons has offe­red turn-key  2D and 3D DIC sys­tems sin­ce 1998, and con­ti­nues to deve­lop and add new advan­ced DIC pro­ducts to our gro­wing pro­duct line. More recent­ly, Cor­re­la­ted Solu­ti­ons has deve­lo­ped new soft­ware that uti­li­ties images from X‑Rays or CT scan­ners to mea­su­re volu­metric defor­ma­ti­on of an object under an app­lied load.

The dia­gram abo­ve dis­plays a typi­cal set­up of how the images are acqui­red during a test. The scan­ner acqui­res images at spe­ci­fic depth coor­di­na­tes, and then Vic-Volu­me ana­ly­zes the image sli­ces to con­struct a 3D volu­me made up of vox­els. The indi­vi­du­al vox­els are the buil­ding blocks for the sub-volu­me, which con­tain the volu­metric image cor­re­la­ti­on data.

 

Example

VIC Volume4

A rein­for­ced rub­ber matrix com­po­si­te is moun­ted bet­ween two grips, and a set of refe­rence images are acqui­red from a CT scan­ner at know incre­ments.  Each ‘sli­ce’ of data is then ana­ly­zed to com­pu­te a sta­tic volu­me mea­su­re­ment.  After the spe­ci­men under­goes a ten­si­le load, images are acqui­red again by the CT scan­ner at the same loca­ti­ons.  Digi­tal Image Cor­re­la­ti­on algo­rith­ms are used to cal­cu­la­te the volu­metric chan­ge or defor­ma­ti­on at each indi­vi­du­al vox­el, which make up the 3D volume.

The abo­ve ani­ma­ti­on dis­plays the inter­nal strain (Ezz) of a rein­for­ced rub­ber matrix com­po­si­te under­go­ing ten­si­on. The volu­metric strain data can be view­ed, ana­ly­zed, or extrac­ted as a volu­me or as indi­vi­du­al data sli­ces. The inter­nal ten­si­on strain can clear­ly be seen.

Vic-Volume Software Features
  • Con­ve­ni­ent AOI selec­tion method through “Twee­ning’’
  • Semi-auto­ma­tic initi­al guess computation
  • Opti­mi­zed for accu­ra­cy redu­ce non-line­ar opti­miz­a­ti­on to redu­ce bias and inter­po­la­ti­on artifacts
  • High­ly Advan­ced memo­ry manage­ment per­mits ana­ly­sis of huge volu­metric data sets
  • Volu­metric 3D dis­pla­ce­ments & strains