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Solid Mechanics UCL MechEng
เข้าร่วมเมื่อ 7 ม.ค. 2021
Uniaxial tensile test with Digital Image Correlation (DIC)
Uniaxial tensile test on a stainless steel sample, ASTM E8. The contour plot of the longitudinal strain is obtained through Digital Image Correlation (DIC). The plot shows engineering and true stress-strain responses.
มุมมอง: 6 196
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Uniaxial tensile test on stainless steel
มุมมอง 4.4K3 ปีที่แล้ว
Uniaxial tensile test performed on a stainless steel sample, ASTM E8
Uniaxial tensile test on 3D printed Nylon SLS with DIC
มุมมอง 1.6K3 ปีที่แล้ว
Uniaxial tensile test performed on 3D printed Nylon SLS. The strain is obtained through Digital Image Correlation (DIC).
Shear bands in Aluminium thin plate with Digital Image Correlation
มุมมอง 2.1K3 ปีที่แล้ว
Uniaxial tensile test and shear bands in Aluminium thin plate. The strains are measured through Digital Image Correlation (DIC).
Uniaxial tensile test and shear bands in Aluminium thin plate
มุมมอง 2.6K3 ปีที่แล้ว
Force-displacement plot from a uniaxial test on Aluminium thin plate, showing shear bands formation.
I don't understand why at the necking, the displacement dropped and not continue to elongate
Different than the type of test that once did. Shouldn’t the narrow part be scored to allow measurement of yield strength and to break at a know location?
How do you calculate true stress and true strain ? Are they estimated from the elongation or the width reduction of the specimen ?
which alloy of aluminium sheet you have used?...and can you please help me to find ultimate load and elongation of aluminium 1050a and aluminium 2024...please
Greetings, Could you please point out the set up, more specifically, the camera and software used please! THANKS A LOT !
Two stereo 5 MP cameras (Basler), equipped with Schneider Kreuznach Xenoplan lenses (focal length 35 mm). The images were captured using Vic-Snap (Correlated Solutions) and were post-processed on Vic-3D (Correlated Solutions).
Can you let me know how did you manage to place the sample at the exact location of Calibration plate
You don't need to place the sample is the exact location where the calibration plate was. In fact, you place the calibration plate where the sample will be, and then take different images by tilting and moving the plate, so that you can later perform the stereo calibration. Additional info: th-cam.com/video/1J6U5NOgF20/w-d-xo.html
Hello Dear, I would like to ask one question. Strain very much depends on extensometer size and position.so we can see that using same sample but different location or extensometer length we can have different value. Could you please give some comments of using DIC to not underestimate or overestimate strain value. Don't you think we should use strain from neck?
Most of the metals and alloys exhibit uniform elongation, during which the strain is uniform along the gauge part and an extensometer does not underestimate the strain value.
@@sigao9751 it is true until necking onset. During necking evolution, either stresses and strain are not uniform along the gauge length and the stress state on the necking section is triaxial. Then, true stress from elongation is useless after necking incepts
I am absolutely agree. The evaluation of strains from width reduction (or diameter reduction) is the correct way after the necking onset. Correct.
very nice video, thanks. Great to see DIC in action.
This video is very useful, thanks!