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That's the acoustic wave of the shot - you were using ammunition that travels just above the speed of sound - it likely slowed before it hit the gel.

Great talk!

I want to apply in python. Do you have code for this

Awesome guys! This update is going to save me ALOT of time :)

I just noticed the overlaying of the 3D data onto the cleaned-up video of the battery. That is just *chef's kiss*. I"m going to have to have a go at that.

Is DIC method effective measuring vibrations in big machines, like engines or bombs? or is it less effective when the object is too big

Who's the team at 16:45?

Will u provide add-in for motion amplification?

And double check the complete setup by taking a dozen frames of an undisturbed specimen. The strains should of course be zero, but they will not be. The magnitude of the reported strains will be the noise floor of results. If the values are too high for your satisfaction, move the camera closer for larger apparent speckles, refocus carefully, or increase the f-stop of the camera. DIC has an inherent noise floor of about 50 microstrain compared to strain gages with a 25 microstrain error. Of course, DIC has the enormous advantage of measuring all 3 surface strains over the entire image in each measurement. And generally at a cost of only 20% of strain gages for only a few measurements.

My experience and that of a few papers for speckle size is more like 8 to 10 pixels. The results were more reliable. Easy math for speckle size = dimension as seen in camera divided by the number of pixels of the camera in that direction (2000) times the 8 to 10. For example, the Specimen size visible in the camera is 10 inches. Again using 2000 pixels and 10 pixels per speckle finds: speckle size = 10 inch / 2000 * 10 = 0.05 inch. Double-check by sampling speckles and counting pixels across them. And about half that spacing between them if they are circular. BTW: Correlated Solutions speckle stampers are great.

Nice video, Correlated! I really like the "behind the scenes" aspect. It helped me follow along in a domain I'm not very familiar! I really need to sit down and become more proficient with iris, these captures and presentations are slick!

Congratulations, Dr. Sutton!

The strain "first principal strain" is 2D strain, right?

Very nice captures!

Can I perform this kind of comparison of FEA and DIC results in vic-2D software? If not, how can I make a proper comparision of those analysis?

Where did you see the value of the differences in the DIC-FE plot? because you say the difference in delta_U is 1.3 mm, but the results in the right side show another number.

Nice presentation

Congratulations, Dr. Sutton!

@ 3:25 When reducing the exposure at this point, what level do we go to?

I am using VIC-snap 9 and the calibration toolbar is inactive. I can take calibration images but they do not appear in the calibration toolbar. What could be the reason? I can calibrate in Vic-3D though

What NI DAQ is it? Model number etc..

Is this camera C-mount or F-mount?

Very interesting. I am using a 3D setup from your company. Why I cannot study smaller than 7 mm with VIC 3D. I can see very clear images of my specimen with surface area of 3 * 5 mm. I do not understand the limitations.

can you provide a lesson about fatigue test？ about equipment and how to test

Hello, Thank you for the informative video! Do you have a video explaining strain calculation in-depth? If not, could you please explain how strain is computed from the displacements? The explanations in the minute 14 of the video was not enough to help me understand.

very interesting presentation. could you share the ppt? I want to study it for teaching. Thank you very much.

very good tutorial

Been using the software for a few years, the tutorial is very nice and complete! I was wondering, is the overexposure during calibration recommended for black spot on white background as well?

Excellent tutorial!

awesome video, what application did you use to set animating load ?

First

Very nice video, great work 👍

Thanks. Nice overview.

Wow Great！

Congratulations, Alistair and CSI's team!!! Proud to be at least a small partner of this very competent team. Correlated Solutions is simply amazing.

Great video! Very informative, are there any guidelines for size of the speckles? For example roughly <5% of the image in diameter. How would you go about speckling a very small component?

Is it possible to get Stress-strain curve in tension and compression using this technique at micro-scale in concrete ITZ region (50-70 um size region)?. Or else at least for a 50mm*50mm concrete cube in compression?

I like the narrators name - Bluejay Robinson.... Two birds, one name... jk.. Nice video ..Very helpful

Nice wee demo

Can we do DIC for pressing of sheet metals

Nice work

How the hencky strains are calculated here.Also can you make one video about the output of the DIC testings it is useful for correlation with FEA

Hi for a drop test of a PET bottle, would you need a sensor, say like a pressure sensor or different sensor at the bottom of the base plate/ bottom plate during impact to calculate deformation/strain. Or is it only the cameras by itself with its triangular positioning which does the job to calculate strain/deformation?

Hi, what if glass layer is in between the camera lens and the speckled object. The object is being dropped from a height to the ground/base plate. Will this set up cause a refraction due to the glass layer present n result in incorrect deformation results.

nice video

Nice work!

Beautifully done! Congratulations.