In this application video, a 2-cam 2.3 Mpx EduDIC system is used to measure the effective (von Mises)
strain and total displacement (with Rigid Body Motion Removed) of a 3D-printed Specimen with Circular
Holes in the new Istra4D V4.13 software.
New features from the Istra4D V4.13 software presented in this application video include;Smart Colorbars, in each camera visualization new colour bars and colour step-levels can be quantified
In the live setup mode, the acquisition frame rate of the cameras operating in Master/Slave mode is set
to 100 fps.
In the projection calibration, the QR-code of the 10mm Calibration Target is recognized and detected
automatically via Istra4D. Each calibration target has its own encrypted QR-code which states the calibration
target’s inherit ID and properties. During the online calibration, the projection calibration model is computed
and updated with a live feedback status.
The automatic recording procedure is then selected for the measurement, and is stopped manually be the
used following the specimen fracture. New HDF5 Image Compression Options, in Istra4D V4.13, allow
users to save the images in different compressed formats for either speed or data space. Selection of
LZ4, for example, is 4x faster than the default compression format, as such, the measurement is saved
in 15 seconds instead of 1 minute.
In the correlation evaluation, the new Startpoint Enhancements feature of Istra4D V4.13 can be seen.
Utilizing a new UI with an upper table (step/startpoint) and lower table (camera/startpoint), a quick and
clear overview of which startpoints have been found is now easy to see. In the upper table, the green bar
icon shows that the startpoint has been found and indicates the respective 3D-residuum.
In the graphical visualization, the 2D-overlay of the effective (von Mises) strain can be seen. The von Mises
strain, also known as equivalent plastic strain or effective strain, is a single scalar value used to measure
total permanent shape change in a ductile material under complex loads. In this measurement the maximum
effective strain is 240 mstrain.
Within the graphical visualization, the new Gauge Plate Data Labelling feature of Istra4D V4.13 is presented,
which shows the process of adding gauge plates to a visualization and values to the plate. Plates can be
assigned a name and relative location within the visualization. Thenafter depending on the value selected,
the plate can be filled with either a static data of the selected gauge quantity, or that of active data based off
the selected visualization. Additionally, data from the entire active grid (visualization) can also be seen.
Finally, a 2D-overlay visualization of the total displacement (with Rigid Body Motion Removed) can also be
seen – showing a max value of 5 mm. New Smart colourbars, in Istra4D V4.13, can be seen whereby for the
selected camera view visualization, both the colour palette and quantification of the colour levels is selected
and reduced to 8-levels – to give better indication of the displacement/strain concentration.New HDF5 Image Compression Options, allowing faster saving of data or smaller data sets to be acquired
Startpoint Enhancements, using a new User-Interface (UI) and faster & more intuitive search algorithm
Guage Plate Data Labelling, allowing freely definable plates to be added anywhere in a visualization with
any active (visualized) or static data values.
3-Point Bending Test of a 3D-printed Specimen with Circular Holes using Istra4D V4.13
To learn more about how Dantec Dynamics can help you solve your testing challenges, contact us today.
